Woodpeckers Precision Woodworking Tools AI7518 Router Mounting Plate Cast Aluminum pre-drilled for Porter Cable 7518 and 7539 Routers Strong, stiff and smooth. Made from cast, precision machined aluminum Easy, exact leveling. Getting this plate exactly level is easy thanks to 8 top accessible fine-pitch leveling set screws A pair of adjustable edge plungers enable you to eliminate any slop between the router plate and the plate opening Multiple starting pin locations and 3 Twist-Lock rings and a locking wrench included with each router plate.