This is Dremel"s 1/2" Drum Sander Accessory Bit. FEATURES: A cylinder covered with aluminum oxide abrasive that sits atop a mandrel. The band covering the cylinder is coarse 60-grit. The band is replaceable. Ideal for rough-shaping and smoothing wood and fiberglass; as well as removing rust from metal surfaces, shaping rubber surfaces, furniture refinishing, and more. Sand inside curves. INCLUDES: One Drum Sander Bit REQUIRES: Rotary Tool SPECS: Drum Diameter: 1/2" (12.7mm) Shank Diameter: 1/8" (3.2mm) COMMENTS: Use a slow speed with this accessory a keep a very light touch for more effective sanding. kr11/14/01 ir/kh