The RYOBI Door Knob Installation Driver is a low profile driver for installing door knobs and hardware. With the low profile design, tighten screws in hard to reach areas with ease. The included 3.5" PH2 removable bit can be used in drills and impact drivers and also features a non-marring sleeve for protecting door hardware. Hold fasteners with the help of the magnetic bit tips providing a sturdy and strong holding power. Complete all your door installation projects with ease by collecting our door installation products, guiding and providing you a solution every step of the way.