Dremel 5/8 In. x 3/8 In. Aluminum Oxide Grinding Stone the highest industrial quality for extended general-purpose grinding and long abrasive life. It is i for use on metals, castings, welded joints, rivets, and rust, and works effectively on most materials including stainless steel. This grinding stone is specially designed for working with conic surfaces and features a 1/8" shank for easy attachment to your rotary tool. Made from durable aluminum oxide, it ensures reliable performance for various grinding tasks. Model Number: 941