JessEm Insert Rings

To vary the size of the bit aperture, these glass-filled polycarbonate flush insert rings securely lock into the 3 7/8" opening with an easy 1/8 turn.

We offer two sets, each with four inserts: one set has center holes of 1/4", 1/2", and 2 1/2", plus a 1 3/16" through bore/1 3/8" counterbore insert for use with guide bushings; the second set contains blanks for making zero-clearance inserts. Each set fits any JessEm lift.