ITEM NAME:30 Pcs 3mm Ceramic Stone Polishing Grinding Rotary Die Grinder Drill Bit Tool Description Specification: Brand new Color & Size: randomly Material: Aluminum & Stone Shank Diameter: approx. 30mm Grit: 46 grit Feature: Assorted Shapes Including: rounded, square & pointed. Maximum 12,000 RPM. Suitable for grinding, polishing & carving etc. For use in die grinders. Easy to use. Durable and practical. Package included: 30 x Drill Grinding Mounted Stones Note: Please allow 1-3mm size errors due to manual measurement. Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same..Suitable for grinding, polishing & carving etc. 30 x Drill Grinding Mounted Stones. For use in die grinders. Material: Aluminum & Stone. Color & Size: randomly. Canada, United Kingdom, Austrilia, France, Germany, Spain, Ireland, Italy, Others.