3/8" thick phenolic supports any router. Two removable rings give three different bit openings (3 7/8", 2 5/8", 1 3/16").

Note: 1 3/16" opening is designed to hold Porter-Cable® style guide bushings. The steel starting guide pin allows routing curved work. The plate is 9 1/32" x 12 3/32" with pre-drilled table mounting holes. Includes magnets and adjusting screws for securing and leveling plate. Also includes concentric rings on bottom of plate for easy alignment when installing router