AK11 Kit contains various steel cutters & burs, wire and bristle brushes, a felt buff and platinum white polishing compound, and various mandrels for using the tools, 3M Scotch-Brite EXL Wheels, 3M Scotch-Brite Radial Bristle Discs, and 3M Ceramic Purple Drums as well as several exclusive items to Foredom. A-10081 Rotating Bur and Tool Holder: Made of plastic, this circular multi-level organizer measures 7" wide by 4" high and features a center cup 2-3/4" diameter and 3" deep for small tools such as scribes, files, and screwdrivers. The 3 level organizer has 114 holes that hold 3/32” - 2.35mm shanks. The lower level has 48 holes, 36 holes on the center level and 30 holes on the top upper level.