Features: 100% brand new. If you're into DIY, craft work, jewelry making or silver smithing, give your small tools even more power and functionality with this set of 1 double sided diamond cutting disc. The discs are super thin making them perfect for making slots and slits and are coated on both sides as well as around the edge. Ideal for marble, concrete, brick, porcelain, ceramics, epoxy, woods, rock, glass, metal, tile, stone, etc. Grain fineness number: Approx. 150. Disc Diameter: 60mm (Approx. 2.36"). Center Hole Diameter: 3mm (Approx. 0.12"). Disc Thickness: 0.6mm (Approx. 0.02"). Shank Diameter: 3mm (Approx. 0.12"). Material: Carbon steel. .