9 PC ROUTER BUSHING REDUCER SET Includes 7 different size bushings 5/32", 9/31", 13/32", 17/32, 21/32, 25/32", 29/32", 2 Locking nuts Will fit router bases or router table inserts with standard 1-3/8" diameter recessed opening Each will accept a router bit that is at least 1/32" smaller than the bushing size