This Is Dremel"s Aluminum Oxide 3/16" Grinding Stone Accessory Bit. FEATURES: A high-quality industrial abrasive made for extended usage. Use on metals, castings, welded joints, rivets and rust. Ideal for sharpening, deburring, cleaning and general purpose grinding of most materials--including stainless steel. Specially designed for working with conic surfaces. Remove rust from cars and bicycles. Deburr pipes. Sharpen fishing lures. INCLUDES: One Grinding Stone Bit REQUIRES: Rotary Tool SPECS: Stone Diameter: 3/16" (4,8mm) Shank Diameter: 1/8" (3,2mm) kr9/27/01 ir/kh