Great variety set that contains 52 assorted bits for cutting, grinding, carving, engraving, shaping, sanding, cleaning and polishing tasks. Includes new mini case that is compatible with XPR system. Case can be converted to individual or bin storage. Dremel attachments and accessories are designed to be just what you need to complete projects. Everything you need to cut, carve, sand, grind, clean, and polish, plus a whole lot moreFor use with Single speed MultiPro Rotary Tool #275, Variable Speed MultiPro Rotary Tool #395, Digital Rotary Tool #398, MiniMite Cordless Rotary Tool Kit #750, and 7.2 volt Cordless MultiPro Rotary Tool Kit #7700CardedReusable storage box.400 Series XPR storage case compatible.Removable organizer tray.