Turn your Dremel rotary tool into a simple-to-use rotary grinder. Our 952 aluminum oxide grinding stone features a high-quality industrial abrasive that's perfect for extended general-purpose grinding on metals, castings, welded joints, rivets and rust. 1/8-inch shank. -Designed specifically to work on cone-shaped surfaces -Compatible with most Dremel rotary tools -Aluminum oxide sharpening stone is ideal for deburring and sharpening most metals, including stainless steel -Ideal for sharpening, deburring and general purpose grinding on most materials including stainless steel -Specially designed for working with conic surfaces -Use on most metals, porcelain & glass -1/8 In. shank (User Tips) -Use the 415 dressing stone to clean the surface of the grinding stone and restore its original shape. You can also use the dressing stone to create a grinding stone with just the right shape for that special job. -For best results, insert the accessory bit all the way into the tool and then back it out slightly before tightening down. This provides plenty of shank for the collet or chuck to hold onto the bit.