12pc Sae 3/8" Dr. Universal Deep Impact Socket Set Drop forged, heat treated, chrome molybdenum Radius corner design contacts only flat surfaces of fastener Sockets Sizes: 5/16" , 3/8" , 7/16" , 1/2" , 9/16" , 5/8" , 11/16" , 3/4" , 13/16" , 7/8 , 15/16" , & 1"