The Kreg Precision Router Table Insert Plate is the one you will want whether they"re outfitting a new router table or upgrading one. The plate features Kreg"s new Level-Loc Reducing Rings that install in seconds and lock in place flush every time. They make setup changes simple by allowing you to quickly swap inserts. Three rings are included to allow the use of large or small bits, as well as guide bushings: 1", 1-13?16" (for use with Porter-Cable style guide bushings) and 2-5?8". Additional sizes of Level-Loc Rings are available separately. The plate measures 9-1?4" x 11-3?4" and is made from 3?8"-thick phenolic that won"t sag, even under the weight of heavy routers. The plate comes with a removable brass starting pin, plate mounting screws and detailed installation instructions. The Precision Router Table Insert Plate can be used with Kreg"s Precision Router Table Insert Plate Levelers, available separately.