Features: Brand new and high quality Diamond Mounted Point used for sculpturing, dressing, precisions grinding and internal grinding in ceramic, glass, stone, alloy and many other abrasive materials. The Cutting Wheels are sharpness and strong, making them perfect for Cutting gemstones, glass, geramics, porcelain, tiles, aluminium and copper. Rotary tool diamond burrs set,Shank Diameter：0.118"(3mm); The Cutting Wheels are sharpness and strong, making them perfect for Cutting gemstones, glass, geramics, porcelain, tiles, aluminium and copper. Diamond grinding burr bits, extremely sturdy and wear resistance. Great for polishing stone, glass, ceramics, tile, brick,fiberglass, rock. DIY craft, craft modeling, home repair (wood, some plastic and dogs’ nails) etc.This diamond grit cutting wheel are suitable for doing DIY, cutting, sawing, carving, sharpening and filing hard. Set Inclue 20x Diamond Bur Bits,10x Diamond Cutting Wheels ,2x Mandrels. Specifications: Material:Stainless Steel Shank Diameter：0.118"(3mm) Package Includes: 20x Diamond Bur Bits 10x Diamond Cutting Wheels 2x Mandrels note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.