Premium Home Improvement Tool: Easily align and center this plate on almost any router; hassle-free setup Predrilled Holes: Router table insert plate holes are compatible with Porter-Cable 690 and 890 Series, along with the Bosch 1617 Level Router Insert Plate: 3/8-inch thick phenolic router table insert is smooth and level Easily Adjust to Router Bits: Level-Loc reducing rings easily adjust the opening around the router bit Premium Kreg Tools: We offer products that help woodworkers close the gap between idea and outcome