Editorial Review Throw with an Edge. Create Matching Sets. Made of 18 Gauge High Quality Stainless Steel (about the thickness of 12 sheets of paper). Does not flex or bend and is very rust resistant! Instructions for Use: 1. On a pottery wheel, throw a cylinder similar to the dimensions and weight listed on the package. 2. With one hand on the inside of the cylinder and the other holding your WiziWig Rib to the outside of the cylinder, press your rib into the cylinder, while applying gentle outward pressure with your inside hand, forming it to the WiziWig Rib profile shape. 3. Gently do this until a continuous, smooth line of clay touches your rib. 4. For a nice, rounded rim, choose a rim size located at the bottom of the WiziWig Rib and place over your rim with very gentle pressure. Leave as is or personalize. See WiziWig Tools website for a video on how to use and further instruction. Some areas of the stainless steel rib are sharp. Please use caution! NOT A TOY