Compliment your tool collection with the 4 PC. 4" Buffing and Polishing Wheel Set. These buffing wheels can be used for multiple stages of the buffing process and can be used on a variety of metals. These wheels are compatible with bench grinders and drills and impact drivers with the included mandrel. For best results use with the RYOBI Metal Cleaning Compound Set. This set includes (1) Sisal Wheel, (1) Denim Spiral Wheel, and (1) Cushion Sewn Wheel and (1) 1/4" Hex Shank Mandrel.