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" shank for added durability. Multi-cutter countersinks for superior finish. Magnetic bit holder accepts 1/4" hex shank insert bits. Includes: Drill/drive system shaft, No. 6 and No. 8 drill countersink inserts, No. 1 and No. 2 Phillips insert bits, heavy-duty plastic case.