【High-quality material】 The cordless impact screwdriver bit holder is made of high-quality chrome vanadium steel with particularly high hardness and good abrasion resistance. Polished, corrosion-resistant finish to make it more durable. 【Easy to Use】The socket kit is easy to install and disassemble, and is not easy to fall off during use. The nut socket set is very occlusive, firm and flexible. Each socket has obvious size marking, you can quickly find the socket you need. 【1/4" Hex Shank】 This hexagon socket is suitable for installation in hexagonal tools such as air screwdriver, electric screwdriver, air drill, electric drill, gun drill , a manual screwdriver and much more. 【Size areas】 7 pieces. Socket Adapter (Inch): 3/16", 1/4", 9/32", 5/16", 11/32", 3/8", 7/16"; 7 Drive Nuts (Metric) : 5mm, 5.5mm, 6mm, 7mm, 8mm, 10mm, 12mm. The different sizes of hexagon drill bits are enough to meet your daily needs. 【Multi-use】 Universal 1/4" hex shanks accommodate quick changes and are securely fixed in standard chucks that fit all drills, screwdrivers and guns. Widely used in household items, auto parts, carpentry, professional machine repairs and much more. Color and size: as pictured. Content: 14 hex sockets Features: - The inner hex socket is made of high quality material, sturdy and durable. - Comes with a work case that is easier to transport and store. - Widely used in DIY, auto parts, woodworking, professional machine repair. - Suitable for installation in hexagonal tools such as air screwdriver, electric screwdriver, air drill, electric drill, electric drill, electric drill, pistol drill, manual screwdriver and more.