The M18 FUEL 1/4 in. Impact driver with ONE-KEY is the fastest, most compact, and most powerful tool in its class. The POWERSTATE brushless motor produces up to 2,000in-lbs of torque, delivering up to 30% faster driving speed, increasing productivity for the most demanding fasteners on the job. At only 4.59 in. in length, this is the most compact impact driver in its class, allowing better access in tight spaces. REDLINK Plus intelligence ensures maximum performance while protecting from overloads, heating and over-discharge. The M18 REDLITHIUM battery packs (not included) deliver more work per charge and more work over the life of the packs than competitors. With ONE-KEY, users gain the ability to customize, track and manage their tool. Save up to 4 task settings directly to the tool. Self-tapping screw mode provides faster installation time, shutting the tool down as soon as the fastener is seated to reduce damage to fasteners and materials. Using the tool's tracking functionality, if ever lost or stolen, lock it out to protect your investment.