7/16" O.D.X 11/32" 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 Brass Template Guide will significantly expand the use of your router. For template controlled operations such as dovetailing, stair routing, hinge butt routing, omni jig template, lock face routing and other general template operations. Template guides can be used directly with any router having a base plate with a 1-3/16"* dia. center hole.