High-quality material The cordless impact driver bit holder is made of high-quality chrome vanadium steel with high hardness and good abrasion resistance. Polished finish and corrosion resistant for increased durability. Easy to Use The socket set is easy to install and disassemble, and remains securely in place during use. The nut socket set is tight-fitting, firm, and flexible. Each socket features clear size markings for quick identification. 1/4" Hex Shank This hex socket is compatible with hexagonal tools such as air screwdrivers, electric screwdrivers, air drills, electric drills, gun drills, and manual screwdrivers. Size Range – 7 Pieces Socket adapter (inches): 3/16", 1/4", 9/32", 5/16", 11/32", 3/8", 7/16" Drive Nuts (Metric): 5mm, 5.5mm, 6mm, 7mm, 8mm, 10mm, 12mm The variety of sizes meets everyday usage requirements. Multi-use Universal 1/4" hex shanks allow for quick changes and secure fit in standard chucks, compatible with most drills, screwdrivers, and impact drivers. Ideal for use in household applications, automotive repair, woodworking, and professional machinery maintenance. Shipping quantity: 1 set