JessEm 02101 Mast-R-Lift - 9 1/4-Inch x 11 3/4-Inch Allows height adjustment and bit changes from above the table 9-1/4- by 11-3/4-inch insert plate size for JessEm router tables Built in plate leveling and insert adjusters for a perfect fit Includes a 1-1/2-inch insert ring with wrench, starting pin, and hex wrench Insert plate is machined with a 3-5/8-inch diameter TAB-LOC centerhole; 1-year limited warranty