You can use core drills to cut holes in ceramic, tile and glass without chipping or cracking. Our diamond-coated core drills have a 3mm (1/8") shank, medium-fine grit and are made of stainless steel on which diamond particles have been electroplated. This set of 6 drills includes sizes 1.5, 2.0, 2.5, 3.0, 5.0 and 6.5mm.
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