The DeWalt DC520KA is a Heavy-Duty 18V Cordless Drywall/Deck Screwdriver Kit. A no-load speed of 0-900 RPM and 0-2900 RPM combines with a maximum torque of 180 in-lbs for fastener driving. The clutch is held apart by light spring pressure so the drilling clutch can rotate without involving the driven clutch and accessory. Each click of the collar gives a change of .007” and a full revolution changes the depth setting .083”.