The 40 Grit CLR95 (photo shown is 150 Grit) is a cylinder shaped diamond bur. The approximate head length is 18mm, and the approximate head diameter is 7mm. This bur is great for grinding or carving all types of stone, glass, tile, wood and more... It works especially well for creating marble or stone sculptures. The 40 Grit is intended to be used for bulk removal and rough cutting. As with all Lasco Diamond Burs, the 40 Grit CLR95 is a high quality, durable, 100% Natural Diamond bur, and is made in the USA. The CLR95 is also available in 40 Grit, 80 Grit, 150 Grit, 200 Grit, 400 Grit, and 600 Grit.