The perfect fix for undersized plywood flat panel "Mission Style" cabinet doors Adjust the panel groove width (3/16" to 9/32" for 1/4" plywood - 7/16" to 17/32" for 1/2" plywood). Cut frame stock for 5/8" through 1-1/4" in thickness. Each set includes 2 pcs. (1 for stile cuts & 1 for rail cuts and shims) Carbide- tipped for longer cutting tool life.