This one simple kit provides everything you need to switch from drilling pocket holes to driving pocket screws in just seconds. The kit includes the new 3/8" diameter step drill bit with 1/4" hex shank that snaps directly into the quick-change chuck with no need for an adaptor, a Quick-Change chuck designed to eliminate slippage and optimize drilling power, an allen wrench, a depth collar, and a 6" long, #2 square drive bit for pocket screw applications.