- Norton Masonry Grinding Wheel - 4.5in. Dia. Price For: Each Series: Norton Masonry Wheel Type: Cutting and Grinding Item: Depressed Center Wheel Abrasive Material: Silicon Carbide Thickness: 1/4" Application: Nonferrous Materials, Concrete Masonry Asphalt Type: Type 27 Grade: Extra Coarse Grit: 24 Diameter: 4-1/2" Arbor Size: 7/8" Max. RPM: 13, 580 Country of Origin (subject to change): China