D20 - 150 Grit Diamond Bur - 3/32" Shank (Made In USA) 6.0mm Approximate Head Diameter, 0.7mm Approximate Thickness, 3/32" Shank 150 Grit 100% Natural Diamond (Not Synthetic), U.S. Made - High Quality - Durable Great for grinding or carving all types of stone, glass, tile, wood, and more This small diamond disc is great for cutting small grooves, lines, or notches The 150 Grit cuts most types of material and reduces chipping and pitting