3M™ 4 1/2" X 1/4" X 5/8" - 11 Cubitron™ II 36 Grit Precision Shaped Ceramic Grain Type 27 Grinding Wheel; 3M™ Cubitron™ II Grinding Wheel is constructed of 3M precision-shaped ceramic grain to bring you an exceptionally fast-cutting and long-lasting rigid bonded wheel for heavy weld removal and other heavy-duty grinding applications. This grinding wheel works well on almost all materials and is specially formulated for use on stainless steel, mild steel, and aerospace alloys.