Glass Drill Bit 5-Pack Diamond Grinding Bits - 120-140 Grit Tips:* Before use, the new tool should be tried at a low speed. Diamond tools are used to grind workpieces. Please use jigs, non-slip finger cots and wear protective glasses when using it. Size: 10mm diameter grinding head with 1/4-inch(6mm) shank. Material: Made of diamond particles, being electroplated, durable for use. * Flying chips may be generated during use. If excessive force is applied, the grinding powder is not easy to remove. Specification: * Shape: Tapered* Granularity: 120 Grit* Head Diameter: 10mm / 0., 39-inch* Head Length: 21mm / 0., 83-inch* Shank Diameter: 6mm / 1/4-inch* Total Length: 60mm / 2., 36-inch* Material: Diamond Coated Package Content: * 5 x Diamond Burrs Description: * Suitable for fine detail work, cutting, engraving, carving, finishing, jade grinding and repair. * Please press gently and avoid shaking. Description: * Suitable for fine detail work, cutting, engraving, carving, finishing, jade grinding and mold repair. * Ideal grinding tool for jade... Suitable for fine detail work, cutting, engraving, carving, finishing, jade grinding and mold repair. * Ideal grinding tool for jade, ceramic, glass, wood... Applications: Ideal grinding tool for jade, ceramic, glass, wood, precious stone and other abrasive materials. Fits for Rotary Tools: Can be installed on the electronic grinder, engraving machines, hanging mill and hand electric drill. Glass Stone Carving Bits Craftsman Rotary Tools Revesun Diamond Burr Bit Set For Rotary Tool 1/8-Inch Shank 50pc 120 Grit Dremel Tool Kit Rotary Tools 1/4 Shank Diamond Burrs