Dremel 5/8" x 5/8" Grinder with 1/8" Shank is a high-quality industrial abrasive made for extended general-purpose grinding on metals, castings, welded joints, rivets, and rust. It is ideal for sharpening, deburring, and general-purpose grinding. Specially designed for working with conic surfaces, this grinder has a maximum speed of 35000 revolutions per minute.