30 pc Fine Diamond Coated Burrs Glass Drill Bit Grit 300 with 1/8 Inch Shank for Dremel and Other Rotary Tools

They will fit your hand drill, drill press & are for Dremel and Foredom tools with a 1/8 collet. Shank diameter: 3.17mm (1/8 inch).
Diamond drill bits in a coarse grit. For drilling glass, shells, tile and stone.
Overall length is 40mm (1-5/8 inch) Premium type diamond coated in GRIT 150 (medium). Suitable for glass, marble, rock or jewelry.
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