Contents: 1/4 inch drive socket bit set (1/4 inch - 25 mm, 30 mm, 50 mm, 65 mm; 3/8 inch - 50 mm, 65 mm; 1/2 inch - 50 mm, 72 mm) universal joint set (1/4 inch, 3/8 inch, 1/2 inch), adapter set (1/4 inch F x 3/8 inch, M, 3/8 inch F x 1/4 inch M, 3/8"F x 1/2" M, 1/2" F x 3/8" M, 1/2" F x 3/4" M, 3/4" F x 1/2" M) Made of CR-MO steel, the high-quality socket adapter set can be used with any high-torque impact wrench. Extensive adapter set for holding socket spanner inserts and sockets in standard drives.