NORTON White 150 MM x 13 MM x 31.75 MM (38A54) Precision Gringing Wheel Vitrified The wheel features a white aluminum oxide abrasive that provides a maximum cut rate and cool grinding action, while the vitrified bond ensures the wheel holds its shape and resists wear. Telescoping bushings ensure the wheel fits most arbor hole sizes. Use the wheel for deburring and tool sharpening with soft carbon steels, tool steels and super alloys.