General description This 21mm impact deep socket is designed for use with 3/8-inch drive impact wrenches. Made from hardened chrome molybdenum steel, it offers durability and strength for heavy-duty applications. The socket features a black phosphate finish that provides corrosion resistance. Technical specifications Size: 21mm Drive Size: 3/8 inch Type: Deep impact socket Material: Chrome molybdenum steel Finish: Black phosphate for corrosion protection Compatibility and accessories Compatible with electric or pneumatic impact wrenches with a 3/8-inch drive Installation Attach the socket securely onto a compatible 3/8-inch drive impact wrench Usage Use with impact wrenches for tightening or loosening nuts and bolts, especially in deep or hard-to-reach areas