Avoid wear caused by repeatedly pressing bushings into your jig fixture. Instead, press fit these sleeves into the fixture one time, and then swap bushings with different IDs in and out to change the size of your bit. Also known as type L headless liner bushings, they're sized for use with removable drill bushings (sometimes called slip-fixed and renewable bushings). Made of hardened steel, they won't wear as you slide the bushings in and out.

Use these sleeves to create a permanent base for bushings, so you can swap sizes or replace worn bushings without damaging your jig. Also known as headed liner or HL bushings, they have a flanged head that stops them from pushing through the jig when you drill. It also protects the surface of your jig from wear. Made of hardened steel, these sleeves hold their shape over time, even with heavy use. Pair them with removable bushings, also called slip-fixed and renewable bushings.