This is the most convenient and versatile solution to changing the bit-hole diameter in all JessEm router plates and lift systems. Molded from glass filled poly-carbonate for long life and durability and featuring JessEm's innovative Tab-Loc™ design.

You can install and remove our insert rings with a quick turn of our two-prong insert ring wrench. This 4 piece set includes 4 blank inserts with a 1/16" pilot hole. They can be machined to suit any router bit size for zero clearance around the bit.