A Strong, Durable Wheel Combining polyurethane foam with aluminum oxide mineral - XR Molded Wheel is strong and dense. Polyurethane foam takes the shape of a wheel inside a mold. As it hardens, the wheel becomes more tough and dense. The strength and durability of XR Molded Wheel make it a good match for deburring, blending and finishing, and – when run according to recommended operating speeds – it will not heat too quickly. For these reasons, it may be used on heat-sensitive metals like stainless steel. Benefits of Aluminum Oxide Mineral Aluminum oxide mineral is a popular choice among industrial professionals because of its fast cut-rate and long life. This mineral makes a tough, durable abrasive that self-fractures to expose fresh cutting edges, whereas traditional natural abrasives dull more quickly. Aluminum oxide is suitable for materials in both woodworking and metalworking, including ferrous alloys. Spanning Industries XR Molded Wheel may be used with inline sanders, bench motors and backstands. It is available in a range of grades and sizes, so users may select the right wheel for their specific application.