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Kreg PRS4038 Precision Router Table Insert Plate - Undrilled This Kreg Table Insert Plate Blank for Routers is made from compression molded phenolic material so it won't sag even under the weight of a heavy router. Designed to use 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 rings for different bit sizes. A blank version comes without predrilled router-mounting holes, and features alignment marks on the underside that make it easy to center and mount any router. Measures 9 1/4" x 11 3/4" (235mm x 298mm) 3/8" thick (9mm) phenolic insert plate Alignment marks make it easy to center and mount on almost any router Level-Loc Reducing Rings Undrilled: This plate comes without any predrilled mounting holes. Alignment marks engraved on the underside make it easy to center and mount any router using the detailed instructions that are included with the plate. Features: Undrilled Router centering marks in underside Comes with 3 Level-Loc insert rigns Construction: Phenolic Compatibility: Precision Router Table Top Precision Benchtop Router Table Level-Loc Reducing Rings Precision Router Table Insert Plate Levelers Dimensions: 9 1/4" x 11 3/4" with 3/8" thick phenolic insert plate Includes: (1) Phenolic insert plate (3) Level-Loc Rings: 1", 1 3/16" (for use with universal-style guide bushings), and 2 5/8" Installation Instructions * Does not come with plate levelers