This convenient woodworking tool adds precision to your routing applications as you work freehand with a handheld router, while you can find the model of your router and the corresponding letter that accommodates a wide assortment of standard routers. This universal router base plate Ideal for edge routing with bits that are on both straight and curved edges. Maintenance: Carnauba wax applied to the base plate will reduce the opportunity of scratching. If scratching occurs, careful use of a plastic polish will remove them. Works with 1/4" router collets For use with 5/16" to 5/8" inner diameter template guide bushing