Features: * The 402 mandrel is used primarily with cut-off wheels but is used with the following Dremel accessories: 409, 411, 412, 413, 420, 423, 425, 426, 456, 511, 512, 540, and 541 * Shank diameter: 1/8 inch What"s In The Box: * Dremel 402 Rotary Tool Mandrel