20pcs 1/2 Inch Drive Socket Set 6 Point Hex Design Impact Socket Set Impact Wrench Nut Spanner Set Impact Socket 8-32mm. Made of heavy-duty heat-treated chrome vanadium steel with a black phosphate coating, makes its high strength provides superior torque and durability. You will have a more powerful socket wrench that will last longer. Hexagonal design: the unique 6-point socket design adds the contact area between the socket and the fastener. The lock force decreases, reduces wear and prevents the corners from turning over. Each tool undergoes multiple precise quality inspection processes, with strict controls at every stage from materials to manufacturing processes. It is burr-free, flawless, and its precision error is controlled to an extremely small range, ensuring safe and stable use. Due to processes such as anodizing, nickel plating for rust prevention, and electrophoretic coating, the tool surface is smooth, corrosion-resistant, moisture-proof, and rust-proof., Manufacturer: THUJMGH