The FLEX FX1371A-1H is an exact 24-volt kit for buyers who need a high-output 1/4-inch hex impact driver and are willing to join the FLEX battery platform. FLEX lists three speed ranges: 0–1,900, 0–2,700, and 0–4,000 rpm. It also claims up to 4,450 impacts per minute and 2,500 in-lb maximum torque. The tool is 4.7 inches long and 2.7 pounds without the battery.

What comes in this kit

The FX1371A-1H package includes the impact driver, a 6.0Ah stacked-lithium battery, and a 280-watt rapid charger. Check the complete model number because bare tools and kits can share the FX1371 family name while carrying very different total cost and weight.

The maximum torque figure is a manufacturer specification, not a promise that every fastener should receive that force. Start in a lower mode, use impact-rated bits, and follow the fastener and material requirements. Finish critical fasteners with the specified method or calibrated torque tool when required.

Where it fits

This tool makes sense for repeated structural screws, deck hardware, long fasteners, and other driving jobs where compact length and impact action help. It is less attractive for an owner who needs only occasional furniture assembly or already has batteries and chargers from another platform.

An impact driver does not replace a drill/driver. It uses a 1/4-inch hex collet, applies impact action, and prioritizes fastening. Use a drill for ordinary round-shank bits, controlled holes, and delicate hardware. Wear eye and hearing protection and keep the bit square to the fastener.

Platform and warranty checks

The kit creates a long-term battery and charger commitment. Compare the other FLEX tools you may actually buy, battery storage, charger location, and replacement cost. Read the current warranty terms and registration requirements rather than assuming every listing receives the same coverage automatically.

Verdict

The FX1371A-1H is a strong fit for frequent fastening and buyers who want this exact battery-and-charger package. It is excessive for light, infrequent screwdriving and a poor value when it creates a second cordless platform without a clear next tool.