The JoolTool can shape, carve and sand wood; or grind, hone and polish metal, carbide and stone. Its Ninja Disc is the backing for a wide range of abrasive overlays. Specialized sanding sheets with peel and stick backings go onto the disk, which then mounts on a spinning shaft that can vary from 500 to 5,000 rpm. JoolTool has a contract with 3M, which makes various options available for the tool. A complete package, with accessories, sells for $349.