38 piece, deep impact, socket set, drop forged, set consists of: (16) 3/8" deep impact sockets sae sizes: 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", metric sizes: 8mm, 10mm, 11mm, 12mm, 13mm, 14mm, 17mm & 19mm, (20) 1/2" shallow impact sockets sae sizes: 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8", 15/16" & 1", metric sizes: 11mm, 12mm, 13mm, 14mm, 16mm, 17mm, 19mm, 21mm, 22mm, 24mm, (1) 1/2" x 3/8" reducer & blow mold storage case, heat treated, chrome vanadium steel, black oxide finish resists rust & corrosion.