The Rout-R-Plate is a 9-1/4" x 11-3/4" dead flat plate with a machined 3-1/2" opening that accepts either of the two included phenolic inserts. One insert closes the hole to 2" for smaller bits, the other is sized for Porter Cable style template guides. The plate fits JessEm, Woodhaven, Woodpeckers, and other router tables. Eight set-screws are located around the perimeter of the plate to bring it flush with your router table surface. Includes an insert wrench, two inserts, and starting pin.