Quick and easy changes between drilling and driving. Black oxide split-point drill bits start on contact. Quick change mechanism for easy one-step loading. Easy push forward for one-handed release. Contoured finger grip for easy ergonomic use 5/16 in shank for added durability. Includes one drill drive holder, one drill drive connector, one #6 and# 8 drill bit with countersink, three screwdriver bit tips, one # 8 replacement drill bit and one heavy-duty case.