Attributes:* Socket Size: 18mm* Drive Size: 3/4-inch* Total Length: 55mm / 2.16-inch* Material: 45#steelWhat Is Included:* 1 Piece x 12-Point Impact SocketApplications & Features:— Suitable for automobile maintenance, mechanical equipment repair, woodworking, home maintenance, etc., which can be used to install, disassemble and repair fastening bolts, shaft nuts, bolts, etc.— Made of 45# steel, which is sturdy, durable, wear-resistant and corrosion-resistant.— The specifications are clearly marked on the surface of the socket for easy identification, improving work efficiency.— To prevent round-off under stress, it grips the flat sides of fastener heads rather than the corners. The 12-point opening can fit both 6 and 12 point fasteners tightly and firmly, allowing it to apply maximum torque without slipping.