Bulk Packaged 5/8 inch Diamond Coated Disk, 3/32 inch hole. Grit, thickness, and actual diameter may vary slightly. Use with 3/32 inch Screw Mandrel which is not included. For use with Dremel 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