The Ball Gouge™ is a unique grinder attachment that can rapidly hollow small concave surfaces in woodworking projects. It has a 30mm diameter ball-shaped cutter, that attaches to the Power Carving Unit™ or any standard 100mm (4") or 115mm (4.1/2") angle grinder. It is specifically designed to provide exceptional control, balance and, performance in freehand wood shaping and carving.