6 piece end mill sets contain one of each: 1/8", 3/16", 1/4", 5/16", 3/8" & 1/2" diameter4 piece long end mill set contains one of each: 1/8", 1/4", 3/8" & 1/2" diameterPLEASE NOTE:Cases for these sets usually ship separately via USPS. All square end mill cutters are center cutting.4 Flute Carbide End Mill Set, 6pc 1/8-1/2 Please allow additional shipping and transit time for the cases for these carbide end mill sets..