Steve & Leif's 6-in-1 Amigo Multi-Purpose Screwdriver with pull out bit cartridge and magnetic bit holder. Each driver comes with seven 1" long bits that are stored securely within the screwdriver's handle. Bits can be used with most power drills and cordless screwdrivers. Shaft opening is a standard 1/4 inch hex nut driver. Bits size metric - PH (1, 2), SL(4.0, 6.0) and PZ2, PZ3.