Shank: 1/8"Cutter Size: 7/8" Diameter X 1/64" ThickIdeal For Cutting, Sawing, Carving, Sharpening And Filing Hard MaterialsUse On Marble, Concrete, Brick, Porcelain, Ceramics, Epoxy And Hard WoodsNot Recommended For MetalWheel Is Completely Coated With Fine Diamond Particles For Working With Hard Materials Mandrel Included