General description This 1/4' hexagon socket head nut driver set includes 9 pieces, designed for use with both corded and cordless screwdrivers. It is ideal for driving hex screws in various applications such as DIY home repairs, woodworking, and automotive work. Technical specifications Bit sizes: 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm Material: Chrome-vanadium steel Packaging dimensions: 12.5 x 11.5 x 2 cm Inner hole diameter: 0.6 mm Installation Simply attach the bits to the screwdriver handle for use. Usage Suitable for driving hex screws in various applications including DIY home repair, woodworking, and automotive work.