3/4" O.D. X 21/32" I.D. GUIDE BUSHING By Peachtree Woodworking PW3886 3/4" O.D. X 21/32" I.D. BRASS GUIDE BUSHING All guides protrude 0.240" to work with any template material of 1/4" thickness and larger Template guides can be used directly with any router having a base plate with a 1-3/16"* dia. center hole. Works with all Black & Decker, DeWalt, Porter Cable, & Skill routers