This 7PCS 1/2 Inch Drive Deep Impact Socket Set is made of heavy duty CR-MO alloy steel with corrosion-resistant black phosphate finish which ensure the long service life.Professional 6-point design and laser-etched marking meet your industrial needs .Axle Nut Socket is used for removal, repair, install, and repair hub or axle nuts on your vehicle; Fits axle nuts on most American domestic and import vehicles. Includes:7 pieces SAE 1/2"drive sockets: 1-3/8", 1-7/16", 1-1/2", 1-9/16", 1-5/8", 1-11/16",1-3/4"; with a durable storage case. Constructed from high strength drop forged chrome molybdenum steel with corrosion-resistant black phosphate finish for durability. 6-point design increases the contact surface,provides maximun torque,fixs fasteners effectively, not easy to fall off,reduces bolts and nuts wear. High visibility laser-etched markings, easy to read, quick identification and easier socket selection. All Tools meet or exceed ANSI & DIN performance standards.