Yonico 21011 Deluxe Aluminum Router Table Mounting Plate, 12-Inch x 9-Inch High quality solid aluminum construction Center Line Ruler 12"L x 9"W x 1/4" Thick with 3-7/8" opening 2 removable plastic rings: 1-1/4" & 2-5/8" openings 4 Rare Earth Magnets, Threaded starter pin & Allen key included High quality solid aluminum construction Pre-marked pilot holes fits most routers 12"L x 9"W x 1/4" Thick with 3-1/4" opening 3 removable plastic rings: 1-1/4", 1-7/16" openings and one customizable blank Rare Earth Magnets, starter pin & allen key included