Norton Type 01 vitrified straight toolroom grinding wheel. Used on surface, cylindrical, and tool and cutter grinders, Norton precision, form-holding vitrified toolroom wheels maximize your productivity. For every ferrous and nonferrous MRO, small job shop, and production operation. Better choice for medium to heavy stock removal. Sharp monocrystalline aluminum oxide grain the industry's most versatile abrasive purple. Free cutting on a wide range of applications and materials. Outstanding form holding. Measures 7-inches diameter by 1/4-inches width, 1-1/4-inches arbor.