Dremel 1/4 In. Aluminum Oxide Grinding Stone the highest industrial quality for extended general-purpose grinding and long abrasive life on metals, castings, welded joints, rivets, and rust. It is designed for use on most materials, including stainless steel, and is specially crafted for working with conic surfaces. Each grinding stone features a 1/8" shank diameter and comes in various bit diameters and thicknesses to suit different needs. This reliable tool ensures efficient grinding performance, making it i for both professional and DIY projects. Model Number: 953