Unique extra small diameter solid carbide compression spiral bit for intricate work, signmaking, cutting out lettering and shapes. Features special adapter to fit handheld trim routers, routers and CNC machines, #46184, diameter (D) 1/8, cutting height (B) 13/16, shank (D) 1/4, overall length (L) 2-1/2, solid carbide compression 3-pc. Set Including two 46180 compression bits and one 47632 router adapter