The corner point on the Shape 4 Polymer Ribs gives a beautiful line on the clay; you also get two flat surfaces and three radiuses.
All of Mudtools polymer pottery ribs are made of a unique flexible material that will not develop burrs or cracks under normal use and over time the rib becomes even more polished. Each polymer shape is available in a variety of hardness’s.
Red = Very soft
Yellow = Soft
Green = Medium
Blue = Firm