High quality chro-moly alloy steel.GP High Torque Drive Socket design for increased strength with reduced chance of fastener rounding.Set weight: 2.5 lbs.Lifetime Warranty.Includes the following Sizes - Item Numbers: 3/4'' x 13/16'' 2346D 19mm x 21mm 2392D 7/8'' x 15/16'' 2349D 1'' x 1-1/16'' 2351D Grey Pneumatic 1504FW 1/2" Drive Thin Wall "Flip" Socket Set - 4-Pc