Bulk h Coarse 80 GritPackaged 1 5/8 inc Diamond Disk. Use with 1/8 inch Screw Mandrel which is included. For use with Dremel Type Rotary Tools. Diamond disks can be used to some extent for cutting. However, there is a limited amount of diamond coating on the edge, most of the coating is on the side. For longer life, use with a cooling agent such as Eurotool Cut Lube.