The Infinity Tools Shape-Up Radius Backcutter Shaper Cutter works together with any of our Shape-Up raised panel shaper cutters to rabbet the back of 3/4"-thick door panels. Used with a raised panel cutter and rub collar, it leaves a clean 1/4"-thick tongue so your panels fit perfectly into the grooves of your rail-and-stile frames. It's a key companion piece in our Shape-Up carbide shaper cutter system. Perfectly fitting raised panels A backcutter puts a gentle radius and rabbet on the rear face of a raised panel, reducing the panel's edge thickness to a consistent tongue. Pairing this backcutter with your front raised-panel profile produces a balanced panel that seats cleanly and consistently — the hallmark of professional-quality cabinet doors. Key specifications Bore: 3/4" Profile: Radius Cutter diameter: 3-1/2" Cutter height: 1/2" Cutter radius: 1/8" Designed for: 3/4"-thick panels; leaves a 1/4"-thick tongue Pairs well with Use this backcutter alongside our raised-panel cutters and rub collars from the shaper cutters and accessories collection. Building cabinet doors? See our door-making tools and the full Shape-Up shaper cutter range.