Small Bowl Stainless Rib (Shape 8) - MudtoolsOur Small Bowl Stainless Rib is designed to give as many radius sweeps on the clay as possible. With a smaller curve in the front and bigger curve in the back, this is a workhorse of a rib. This rib will become indispensable, particularly if you love throwing round forms. Mudtools stainless steel ribs are all made of cutlery grade stainless steel with varying flexibility among the tool styles. This same shape is also available in various polymers.