A bezel mandrel oval is a tool used to shape oval bezels. A bezel is a metal ring that holds a gemstone in place. Bezels can be made in a variety of shapes, but oval bezels are a popular choice for jewelry making.

Bezel mandrels are typically made of wood or metal. They have a series of concentric grooves that are different sizes. The bezel maker places the bezel metal in the groove that is the same size as the gemstone and then uses a hammer or other tool to shape the bezel around the gemstone.

Bezel mandrels are an essential tool for jewelry makers who create bezel-set jewelry. They are easy to use and can produce professional-looking results.