These stilts are designed specifically for heavy pieces that need inner support and a glazed bottom. Simply invert your glazed pot on top of this stilt while firing. They are made from a high temperature clay body and are strong and durable. They can be fired multiple times and withstand rugged treatment. The metal points are made from high quality metal alloy, making them sturdy and long-lasting. Each arm has 5 metal points, for a total of 15. The length of inner metal rod measures 5.75".Stilt is rated to cone 10.