3-Jaw Keyless Chuck screws directly on threaded portion of motor shaft for fast replacement of bits and accessories with 1/64 inch to 1/8 inch shanks. Fits Dremel 275, 285, 300, 395, 595, Professional (398), 7800, 800, 3000, 400XPR, 4000, 4200, 8200 and 8220, plus some Craftsman® rotary tools.
