3M™ Combi wheel is made of a unique mixture of aluminium oxide coated abrasives and Scotch-Brite™. Our combi wheels are designed for a wide range of finishes.Use 3M™ Combi Wheel for a wide range of finishes. Our wheels are made of a unique combination of aluminium oxide coated abrasives and Scotch-Brite™. The wheels provide a combination of cutting action and gentle uniform finish, as well as removing scratches.