Our 1/4" thick aluminum router table insert will support the heaviest of routers, without plate sag. The plate is about 9" x 12" and includes leveling screws and magnets to secure the plate in the table. Includes three separate insert rings with attaching screws which provide opening sizes (3-1/4", 1-7/16", 1-3/16" for template guides and a blank insert ring to create your own size). The steel starter pin is for routing curved pieces. Pre-marked mounting hole indentations provided for most popular routers. (The plate is not pre-drilled).