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Not all cordless drill & impact driver are built alike. We dug into the FLEX FX1551A-Z and pulled out 122 specs & features — like general information, power & motor, battery & charging & chuck & drive system — that show what it’s really about.
A fast snapshot of the FLEX FX1551A-Z, covering its standout specification and what you can expect right out of the box.
FLEX FX1551A-Z
The FX1551A-Z is a 24V Brushless 1 in. SDS-Plus Rotary Hammer (Bare Tool). It delivers 1.7 ft-lbs of impact energy and includes Vibration Suppression to protect the user. It is perfect for drilling anchor holes in concrete and brick with professional speed.
Specifications & Facts 122
Specs measured. Drama avoided.
Not just numbers on a box. We looked at how the FLEX FX1551A-Z actually performs with specs like general information, power & motor, battery & charging & chuck & drive system and others that users rely on daily.
General Information 12
FLEX FX1551A-Z Power Source
What is the power source?
0 FLEX FX1551A-Z 0 Votes Cordless
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FLEX FX1551A-Z
Powered by a Cordless setup, providing mobility and freedom from an AC power cord.
Cordless operation requires compatible batteries and affects run-time planning on the job.
Specifies how the tool receives power.
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FLEX FX1551A-Z Motor Type
What type of motor does it use?
0 FLEX FX1551A-Z 0 Votes Brushless
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FLEX FX1551A-Z
Equipped with a Brushless motor, which typically offers higher efficiency, longer lifespan, and lower maintenance than brushed motors.
Brushless motors also tend to improve battery runtime for a given workload.
Describes whether the motor is brushed or brushless.
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FLEX FX1551A-Z Release Year
What is the release year?
0 FLEX FX1551A-Z 0 Votes 2021
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FLEX FX1551A-Z
Release year is 2021, so the design and features align with tool technology and standards from that period.
Consider that accessory compatibility may follow trends established around 2021.
Indicates the year the product was released.
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FLEX FX1551A-Z Product Type
What is the product type?
0 FLEX FX1551A-Z 0 Votes Hammer Drill
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FLEX FX1551A-Z
Classified as a Hammer Drill, which provides percussive action for drilling into masonry as well as standard rotary drilling.
This makes it suitable for concrete, brick, and similar materials when using appropriate bits.
Identifies whether the tool is a drill, impact driver, hammer drill, or combo kit.
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FLEX FX1551A-Z Professional Grade
Is this tool professional grade?
Yes 0Votes FLEX FX1551A-Z
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FLEX FX1551A-Z
Marked as professional grade, indicating construction and durability intended for frequent jobsite or commercial use.
This typically means better materials, tolerances, and support compared with consumer-grade tools.
Indicates whether the tool is rated for professional-grade performance.
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FLEX FX1551A-Z Cordless Platform Compatibility
What battery platform is it compatible with?
0 FLEX FX1551A-Z 0 Votes 24V
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FLEX FX1551A-Z
Compatible with the 24V cordless platform, so batteries and chargers from the same voltage family will be interchangeable.
Using a 24V platform is useful for higher-demand applications compared with lower-voltage systems.
Specifies the battery voltage/platform the tool is compatible with.
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FLEX FX1551A-Z Package Type
Is it sold as a tool only or a kit?
0 FLEX FX1551A-Z 0 Votes Tool Only
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Indicates whether the product is sold as a standalone tool or with included accessories.
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FLEX FX1551A-Z Country of Manufacture
Where is the tool manufactured?
0 FLEX FX1551A-Z 0 Votes China
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States where the product is manufactured.
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FLEX FX1551A-Z Certification Compliance
What certifications does it comply with?
0 FLEX FX1551A-Z 0 Votes UL
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Lists applicable safety or compliance certifications.
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FLEX FX1551A-Z Tool Class
What is the tool class?
0 FLEX FX1551A-Z 0 Votes Heavy Duty
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Indicates the size and power class of the tool.
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FLEX FX1551A-Z Intended Use
What is the intended use?
0 FLEX FX1551A-Z 0 Votes Professional, Construction
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Defines the recommended usage segment.
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FLEX FX1551A-Z Brushless Motor
Does it feature a brushless motor?
Yes 0Votes FLEX FX1551A-Z
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Confirms if the tool features a brushless motor design.
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Power & Motor 14
FLEX FX1551A-Z No Load Speed High
What is the high no-load speed?
980 RPM 0Votes
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FLEX FX1551A-Z
No-load high speed is 980 RPM, which favors torque and controlled operation over very high-speed drilling.
This speed range is useful for screw driving and medium-duty drilling tasks.
Defines the higher gear rotational speed without load.
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FLEX FX1551A-Z Max Torque
What is the maximum torque?
22.8 in-lbs 0Votes
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FLEX FX1551A-Z
Maximum torque is 22.8 in-lbs (2.58 N·m), a level suited to light fastening and precision tasks rather than heavy structural fastening.
Expect modest turning force appropriate for small screws and delicate assemblies.
Represents maximum fastening torque output.
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FLEX FX1551A-Z Max Drilling Capacity Wood
What is the max drilling capacity in wood?
1.19 inch 0Votes
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FLEX FX1551A-Z
Wood drilling capacity is 1.1875 in (3.02 cm), suitable for common woodworking holes and larger-diameter bit use.
This capacity covers most general carpentry drilling needs.
Maximum recommended drilling diameter in wood.
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FLEX FX1551A-Z Max Drilling Capacity Metal
What is the max drilling capacity in metal?
0.5 inch 0Votes
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FLEX FX1551A-Z
Maximum metal drilling capacity is 0.5 in (1.27 cm), adequate for pilot holes and smaller through-holes in steel and other metals.
For larger metal drilling consider step bits or specialized drill setups.
Maximum recommended drilling diameter in metal.
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FLEX FX1551A-Z Max Drilling Capacity Masonry
What is the max drilling capacity in masonry?
1 inch 0Votes
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FLEX FX1551A-Z
Maximum masonry drilling capacity is 1 in (2.54 cm), suitable for anchor holes and medium-sized masonry penetrations.
Use proper masonry bits and appropriate drilling technique for best results.
Maximum recommended drilling diameter in masonry.
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FLEX FX1551A-Z Voltage
What is the operating voltage?
24 Volt 0Votes
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FLEX FX1551A-Z
Rated voltage is 24 Volt, which defines the battery family and electrical characteristics of the tool.
Use batteries and chargers rated for 24 V to ensure proper performance and safety.
Indicates the operating voltage of the tool platform.
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FLEX FX1551A-Z Impact Rate
What is the impact rate?
4,500 BPM 0Votes
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FLEX FX1551A-Z
Impact rate is 4500 BPM, indicating rapid percussive action for driving fasteners or assisting in material removal.
Higher BPM generally increases driving aggressiveness and speed for compatible fasteners.
Defines the number of impacts per minute for impact drivers or hammer drills.
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FLEX FX1551A-Z Soft Start
Does it support soft start?
Yes 0Votes FLEX FX1551A-Z
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FLEX FX1551A-Z
Soft start is present to reduce initial torque surge at startup, improving control and reducing stress on fasteners and the motor.
This feature helps prevent cam‑out and sudden jolts when beginning a drive.
Gradually increases speed to reduce kickback.
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FLEX FX1551A-Z Variable Speed Control
Does it have variable speed control?
Yes 0Votes FLEX FX1551A-Z
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Indicates if the trigger allows adjustable speed control.
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FLEX FX1551A-Z Speed Settings Count
How many speed settings are available?
0 FLEX FX1551A-Z 0 Votes 1
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Shows how many mechanical speed ranges are available.
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FLEX FX1551A-Z Hammer Function
Does it include a hammer function?
Yes 0Votes FLEX FX1551A-Z
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Indicates whether hammer drilling mode is available.
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FLEX FX1551A-Z Stall Protection
Does it include stall protection?
Yes 0Votes FLEX FX1551A-Z
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Prevents motor damage during stall conditions.
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FLEX FX1551A-Z Electronic Brake
Does it have an electronic brake?
Yes 0Votes FLEX FX1551A-Z
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Stops the motor quickly after trigger release.
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FLEX FX1551A-Z Overload Protection
Does it have overload protection?
Yes 0Votes FLEX FX1551A-Z
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Protects motor and battery from excessive load.
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Battery & Charging 11
FLEX FX1551A-Z Battery Platform
Which battery platform is compatible?
0 FLEX FX1551A-Z 0 Votes 24V
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Specifies which battery platform the tool is compatible with.
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FLEX FX1551A-Z Battery Type
What is the battery type?
0 FLEX FX1551A-Z 0 Votes Slide Pack
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Defines the physical battery attachment format.
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FLEX FX1551A-Z Battery Chemistry
What is the battery chemistry?
0 FLEX FX1551A-Z 0 Votes Lithium Ion
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Indicates the chemical composition of the battery cells.
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FLEX FX1551A-Z Battery
Is a battery included?
No 0Votes FLEX FX1551A-Z
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Indicates whether at least one battery is included.
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FLEX FX1551A-Z Charger
Is a charger included?
No 0Votes FLEX FX1551A-Z
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Confirms whether a charger is included in the package.
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FLEX FX1551A-Z Fast Charging
Does it support fast charging?
No 0Votes FLEX FX1551A-Z
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Indicates compatibility with rapid charging systems.
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FLEX FX1551A-Z Battery Indicator
Does it have a battery indicator?
No 0Votes FLEX FX1551A-Z
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Shows remaining battery charge level.
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FLEX FX1551A-Z Interchangeable Battery System
Is the battery interchangeable across tools?
Yes 0Votes FLEX FX1551A-Z
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Indicates compatibility across multiple tools in the same lineup.
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FLEX FX1551A-Z Smart Battery Protection
Does it include smart battery protection?
Yes 0Votes FLEX FX1551A-Z
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Protects battery from overcharge, overheating, and over-discharge.
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FLEX FX1551A-Z Replacement Battery Availability
Are replacement batteries available?
Yes 0Votes FLEX FX1551A-Z
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Confirms whether replacement batteries are widely available.
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FLEX FX1551A-Z Wireless Charging
Does it support wireless charging?
No 0Votes FLEX FX1551A-Z
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Indicates compatibility with wireless charging systems.
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Chuck & Drive System 9
FLEX FX1551A-Z Chuck Size
What is the chuck size?
1 inch 0Votes
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FLEX FX1551A-Z
Chuck size is 1 in (2.54 cm), supporting larger-diameter bits and some specialty chucks.
A 1 in chuck provides more robust bit retention for heavy-duty bits.
Specifies the maximum shank diameter the chuck can accept.
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FLEX FX1551A-Z Bit Type Compatibility
What bit types are compatible?
0 FLEX FX1551A-Z 0 Votes SDS Plus
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FLEX FX1551A-Z
Compatible with SDS Plus bits, a common standard for masonry and hammer drilling that allows quick bit changes and better impact transfer.
Use SDS Plus bits for efficient drilling in concrete and masonry.
Indicates which bit shank types are supported.
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FLEX FX1551A-Z Chuck Type
What type of chuck does it use?
0 FLEX FX1551A-Z 0 Votes Keyless
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Identifies the chuck or collet mechanism used to hold bits.
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FLEX FX1551A-Z Keyless Chuck
Does it feature a keyless chuck?
No 0Votes FLEX FX1551A-Z
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Indicates if bits can be changed without a key.
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FLEX FX1551A-Z Spindle Lock
Does it have a spindle lock?
No 0Votes FLEX FX1551A-Z
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Locks the spindle for easier bit installation or removal.
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FLEX FX1551A-Z Quick Release System
Does it have a quick release system?
Yes 0Votes FLEX FX1551A-Z
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Allows rapid bit changes with one hand.
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FLEX FX1551A-Z Clutch Type
What type of clutch system is used?
0 FLEX FX1551A-Z 0 Votes Mechanical
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Specifies the type of torque control clutch system.
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FLEX FX1551A-Z Magnetic Bit Holder
Does it include a magnetic bit holder?
No 0Votes FLEX FX1551A-Z
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Indicates whether a built-in magnetic bit holder is included.
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FLEX FX1551A-Z Forward Reverse Switch
Does it have a forward/reverse switch?
Yes 0Votes FLEX FX1551A-Z
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Allows switching between forward and reverse rotation.
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Performance & Efficiency 8
FLEX FX1551A-Z Efficiency Rating
What is the efficiency rating?
0 FLEX FX1551A-Z 0 Votes Premium
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FLEX FX1551A-Z
Efficiency rating is listed as Premium, implying higher performance and potentially better energy use compared with standard models.
Expect prioritization of runtime and power delivery in this rating category.
Specifies the efficiency rating of the tool or battery system.
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FLEX FX1551A-Z Load Sensing Technology
Does it have load sensing technology?
Yes 0Votes FLEX FX1551A-Z
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FLEX FX1551A-Z
Load sensing technology is present, which lets the tool adjust power delivery based on the applied load to improve efficiency and control.
This helps extend runtime and reduce wear when the tool encounters varying resistance.
Automatically adjusts performance based on load conditions.
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FLEX FX1551A-Z Heat Management System
Does it include a heat management system?
Yes 0Votes FLEX FX1551A-Z
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Describes whether the tool includes active heat dissipation features.
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FLEX FX1551A-Z Auto Torque Adjustment
Does it support auto torque adjustment?
No 0Votes FLEX FX1551A-Z
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Automatically modifies torque output based on resistance.
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FLEX FX1551A-Z Smart Control Integration
Does it support smart control integration?
No 0Votes FLEX FX1551A-Z
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Indicates compatibility with smart tool management systems.
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FLEX FX1551A-Z Drilling Mode
Does it include drilling mode?
Yes 0Votes FLEX FX1551A-Z
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Confirms availability of standard drilling mode.
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FLEX FX1551A-Z Impact Mode
Does it include impact mode?
No 0Votes FLEX FX1551A-Z
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Confirms availability of impact driving mode.
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FLEX FX1551A-Z Hammer Mode
Does it include hammer mode?
Yes 0Votes FLEX FX1551A-Z
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Confirms availability of hammer drilling mode.
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Build Quality & Durability 14
FLEX FX1551A-Z Housing Material
What is the housing material?
0 FLEX FX1551A-Z 0 Votes Reinforced Plastic
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FLEX FX1551A-Z
Housing material is Reinforced Plastic, which balances impact resistance and weight savings compared with metal housings.
Reinforced plastics are commonly used to survive jobsite knocks while keeping the tool manageable.
Specifies the primary material used for the tool body.
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FLEX FX1551A-Z Grip Material
What is the grip material?
0 FLEX FX1551A-Z 0 Votes Rubber Overmold
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Describes the material covering the handle area.
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FLEX FX1551A-Z Reinforced Gearbox
Does it have a reinforced gearbox?
Yes 0Votes FLEX FX1551A-Z
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Indicates if the gearbox is reinforced for heavy-duty use.
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FLEX FX1551A-Z Metal Gear Construction
Does it use metal gear construction?
Yes 0Votes FLEX FX1551A-Z
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Confirms if internal gears are made of metal.
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FLEX FX1551A-Z Dust Resistance Rating
What is the dust resistance rating?
0 FLEX FX1551A-Z 0 Votes None
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Indicates level of dust ingress protection.
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FLEX FX1551A-Z Water Resistance Rating
What is the water resistance rating?
0 FLEX FX1551A-Z 0 Votes None
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Indicates protection against water exposure.
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FLEX FX1551A-Z Drop Protection
Does it have drop protection?
Yes 0Votes FLEX FX1551A-Z
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Indicates whether the tool is designed to withstand accidental drops.
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FLEX FX1551A-Z Corrosion Resistance
Is it corrosion resistant?
Yes 0Votes FLEX FX1551A-Z
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Confirms resistance to rust or corrosion.
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FLEX FX1551A-Z Shock Resistant Design
Does it have a shock resistant design?
Yes 0Votes FLEX FX1551A-Z
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Indicates internal protection against mechanical shock.
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FLEX FX1551A-Z Thermal Protection
Does it include thermal protection?
Yes 0Votes FLEX FX1551A-Z
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Protects internal components from excessive heat.
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FLEX FX1551A-Z Overheat Protection
Does it have overheat protection?
Yes 0Votes FLEX FX1551A-Z
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Automatically shuts down tool when overheating is detected.
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FLEX FX1551A-Z Sealed Switch Design
Does it have a sealed switch design?
Yes 0Votes FLEX FX1551A-Z
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Prevents dust and debris from entering switch components.
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FLEX FX1551A-Z Heavy Duty Rating
Is it rated for heavy-duty use?
Yes 0Votes FLEX FX1551A-Z
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Indicates suitability for heavy-duty jobsite use.
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FLEX FX1551A-Z Industrial Use Approval
Is it approved for industrial use?
Yes 0Votes FLEX FX1551A-Z
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Confirms approval for industrial-level operation.
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Dimensions & Weight 5
FLEX FX1551A-Z Depth
What is the overall depth?
12 inch 0Votes
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FLEX FX1551A-Z
Depth is 12 inch (30.48 cm), describing the tool’s measured depth in its packaged or operational dimension.
That corresponds to roughly thirty centimetres front-to-back.
Measures the front-to-back length of the tool.
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FLEX FX1551A-Z Width
What is the overall width?
5 inch 0Votes
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FLEX FX1551A-Z
Width measures 5 in (12.7 cm), giving a sense of the tool’s overall bulk and how it will fit in tool belts or cases.
A narrower width helps with single-handed access between studs or tight framing.
Measures the overall side-to-side width of the tool body.
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FLEX FX1551A-Z Height
What is the overall height?
8 inch 0Votes
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FLEX FX1551A-Z
Height is 8 in (20.32 cm), indicating a compact profile that is easier to maneuver in confined spaces.
A shorter height typically improves access in cabinets and tight overhead areas.
Measures total height from base to top.
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FLEX FX1551A-Z Tool Weight
What is the tool weight?
7 lbs 0Votes
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FLEX FX1551A-Z
Tool weight is 7 lbs (3.18 kg), which is on the heavier side for handheld drills and may increase fatigue during long sessions.
Consider balance and grip when planning extended use with a 7 lbs tool.
Weight of the bare tool without battery.
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FLEX FX1551A-Z Compact Design
Is it designed as a compact tool?
No 0Votes FLEX FX1551A-Z
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Indicates whether the tool is marketed as compact for tight workspaces.
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Ergonomics & User Comfort 14
FLEX FX1551A-Z LED Work Light
Does it include an LED work light?
Yes 0Votes FLEX FX1551A-Z
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FLEX FX1551A-Z
Includes an LED work light to illuminate the work area in low-light conditions.
Integrated lighting improves accuracy and safety when working in dim spaces.
Confirms presence of built-in LED illumination.
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FLEX FX1551A-Z Trigger Sensitivity
What type of trigger sensitivity does it have?
0 FLEX FX1551A-Z 0 Votes Variable Speed
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FLEX FX1551A-Z
Features Variable Speed trigger sensitivity, enabling precise control by varying speed with trigger pressure.
This aids in delicate starts and prevents over-driving screws.
Describes the trigger responsiveness configuration.
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FLEX FX1551A-Z Ergonomic Handle
Does it have an ergonomic handle?
Yes 0Votes FLEX FX1551A-Z
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Indicates whether the handle is shaped for ergonomic comfort.
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FLEX FX1551A-Z Anti Slip Grip
Does it feature an anti-slip grip?
Yes 0Votes FLEX FX1551A-Z
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Confirms the presence of slip-resistant grip surfaces.
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FLEX FX1551A-Z Handle Design
What is the handle design?
0 FLEX FX1551A-Z 0 Votes Pistol Grip
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Describes the structural handle layout.
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FLEX FX1551A-Z Soft Grip
Does it include a soft grip?
Yes 0Votes FLEX FX1551A-Z
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Indicates cushioned grip material for comfort.
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FLEX FX1551A-Z Vibration Reduction System
Does it have a vibration reduction system?
Yes 0Votes FLEX FX1551A-Z
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