Multi-bit driver: Include 12 screwdriver bits and a 1/2 square drive bit holder. Widely use: Fit for loosening stuck or frozen screws. High quality: Made of chrome steel, anti-corrosion and rust-resistant, durable and reliable to use, with twist reverse function. Anti-skid design: Heavy knurling allows grip by oily hands, for safety. Easy to use: There are various batch heads to choose. With a metal storage case, all bits compactly are organized in a pocket-sized case, can bring it anywhere. Includes:1/2 Sq Drive Impact Driver, with 1/2 Sq Drive to 8mm Hex AdaptorHex Bits: 4, 5, 6, 8mmSlotted Bits; 5, 6, 8, 9mmCross Bits; 1, 2, 3, 4mm Features Nut Driver Type Multi-Bit Driver Main Material Cr-v Battery Included No Voltage Does not appl.