Eight-cutter double-sided cope & pattern sets cut both 1-3/8" passage doors and 1-3/4" entry doors simply by changing the center cutters.
Standard sets cut a 1/4" or 1/2" wide × 5/8" deep tongue and groove, and the double-sided design turns a fresh edge to the work for twice the run between sharpenings. Mini-Pro versions are not to be used on a 1/2" spindle.
