14 piece, cobalt metal drill bit set, sets consists of: 1/16", 5/64", 3/32", 7/64", (2) 1/8", 9/64", 5/32", 3/16", 7/32", 1/4", 5/16", 3/8" & 1/2" bits, manufactured from cobalt for drilling in hard & abrasive materials, no-skate tip for clean & accurate starts, 3 flat shank promotes better grip on bits 3/16"& larger, designed for very high drilling temperatures for superior performance in stainless steel, high visibility marking provide clearly marked diameter.