The Dremel 401 Polishing Mandrel is a versatile accessory for your Dremel multi-tool. It features a 3.2mm shank with a screw-like head, designed to securely hold polishing bits and accessories. This mandrel is primarily used with Dremel felt polishing accessories such as the 414, 422, and 429 models. It is suitable for hobby and rotary applications, with a maximum RPM of 35000. This multipack contains 3 mandrels.