The most used carving tool is a wood gouge which has a curved concave cutting edge. Woodcraft.com offers wood carving gouges that range in widths from #1 to #28 sweep with varying degrees of curvature. A back bent gouges which has a convex cutting edge to clean the underside of a carving. A fishtail gouge is useful for cleaning corners. A spoon gouge is essential for detail work. Heavy duty gouges are used for quickly roughing out a large section of wood.