Milescraft 1228 Metal Bushing Set - 11 pc. Router Template Guide Set ? Fits Porter Cable Style Router Sub Bases - Universal The Milescraft Metal Bushing Set is comprised of seven carbon steel one-piece bushings, two locknuts, and one top hat adaptor. The router bushings have outer diameters of 5/16?, 3/8?, 7/16?, 1/2?, 5/8?, 3/4?, and 51/64?. This router template guide set comes in a locking storage case with peg hook and a foam insert to keep the accessories in position. Compatible with all router sub-bases with a 1-3/16? (30. 2mm) center hole diameter and can be used with all Milescraft Turn Lock products. These guide bushings are great for use when dovetailing, sign making and inlay routing. Features Universal 2 piece Bushing system is compatible with all Router sub-bases with a 1-3/16? (30. 2mm) center hole diameter Outer diameters of 5/16?, 3/8?, 7/16?, 1/2?, 5/8?, 3/4?, and 51/64? Comes in a locking storage case with peg hook and a foam insert to keep the accessories in position Includes top hat adaptor and can be used with all Miles craft turn-n-lock products 1-3/16? O.D. wave washer included, which provides resistance against the locking nut to keep your template guide bushing firmly locked in place USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.