The RIDGID Universal Router Bushing Kit is compatible with most fixed routers and plunge routers (router not included). The kit is ideal for cutting dovetails, creating signs and template work. Compatible with most fixed routers and plunge routers (router not included) Use for cutting dovetails, creating signs and template work 1-piece, threaded bushings are constructed of titanium-plated, milled solid steel Bushing laser-etched dimensions: 3/8 in., 5/16 in., 7/16 in., 1/2 in., 5/8 in., 51/64 in., and 25/64 in. Non-drilled sub-bases with paper templates Countersink pilot bit to customize sub-bases for different routers Centering cone for 1/4 in. and 1/2 in. collets to center the bushing and sub-base on the router Locknuts secure sub-bases and bushings to routers without the need for tools Includes 8 bushings, 2 locknuts, a 2-part centering cone, 2 non-drilled sub-bases, a countersink pilot bit, paper templates and a product manual MFG Brand Name : RIDGID MFG Model # : RBK1032 MFG Part # : 861019