Freud® 89-660 3-Pc. Undersized Plywood Router Bit SetFreud Undersize Plywood bits are designed to rout perfectly fitted grooves and dadoes for today's undersized plywood panels. These two sets include bits that match up to the actual thickness of 1 4", 1 2" and 3 4" plywood. Choose 1 4" or 1 2" shank sets. Both include a wooden case, and are suitable for use with hand held or table mounted routers to cut hardwood, softwood, plywood or composites. Sets include bits that match the true thickness of 1 4",