12 Pc 1/2" Drive Deep Impact Metric Socket Set Deep impact sockets are drop forged carbon steel, heat treated, oil quenched. Socket sizes: 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 17mm, 19mm, 21mm, 22mm, 24mm. Very nice, steardy set of impact sockets. 1 pc Blow Mold Storage Case.