Feature:Diamond Grinder Bit--Diamond grinder bit can be used for grinding stained glass and suitable for Inland, Gryphon, Delphiglass, Glastar and other brand glass grinding machines. Specifications--Height: 32 mm/1.25"--Diameter: 19 mm/0.74"--Diameter of the Shaft Hole: 8 mm/0.31"Durable and Sturdy--For quick glass removal and for large areas with minimal chipping. Diamond grinder bits are made of high-quality copper and diamond materials for performance, strength and durability.Packing List:1 Pack of Diamond Grinder Bit