The wood gouge, with a curved concave cutting edge, is the most used carving tool. JapanWoodworker.com offers wood carving gouges that range in width from #1 to #28 sweep with various degrees of curvature. Looking to clean the underside of a carving? Look for a back bent gouge with a convex cutting edge. Fishtail gouges are used for cleaning corners. Spoon gouges are essential in detail work. Heavy duty gouges are used for quickly roughing out a large section of wood.