20Pcs Diamond Mounted Point, 4mm Ball Head, 3mm Shank, Diamond Grinding Bit Rotary Burrs, for Jade Stone Jewelry Ceramic Carving Polishing
- Ball shape, diamond coated head. Can be installed on electronic grinders, hanging grinders and hand drills..
- Used for engraved, trimmed, precision ground and internally ground cemented carbide for jades, ceramics, glass, precious stones, alloys, woods..