The M18 FUEL 2-tool Combo kit with ONE-KEY is the highest performing hammer drill and impact driver in the industry with the added control of ONE-KEY. The kit includes the M18 FUEL 1/2 in. Hammer drill/driver w/ ONE-KEY (2806-20) that delivers up to 60% more power, up to 1.5 in. Shorter length and up to 2X faster speed under heavy load. At 1,200 in-lbs of torque and only 6.9 in. in length, it has the power for demanding applications and ability to access tight spaces. The hammer drill's anti-kickback technology increases control in bind-up situations and reduces unwanted shut-downs, with the added benefit of controlling sensitivity preferences. Also included is the M18 FUEL 1/4 in. Impact driver w/ ONE-KEY (2857-20). It is the fastest, most compact, and most powerful impact driver in its class. With up to 2,000in-lbs of torque, it delivers up to 30% faster driving speed at only 4.59 in. in length, with up to 25% more power. The M18 REDLITHIUM battery packs deliver more work per charge and more work over the life of the packs than competitors. Both tools are ONE-KEY compatible, allowing users to customize, track and manage their tool for increased productivity. Using the tool's tracking functionality, if ever lost or stolen, lock it out to protect your investment.