Solid phenolic resin plate and plastic insert ring. Makes lifting router from table more convenient for comfortable bit changes, height adjustments and maintenance. Allows for easier freehand and guided edge work. Includes router plate, insert ring ID 38 x OD 102mm (1-1/2" x 4"), 2 x plate locking bolts and hardware pack. Compatible with most non-Triton routers. 10mm (3/8”) thick. Plate measures 210 x 298mm (8-1/4" x 11-3/4"). Accepts additional inserts for multiple size openings. 8-1/4 x 11-3/4"