This round bracelet mandrel is made of hardened tool steel with a smooth finish and even taper. It is designed for making cuffs, bangles, and other curved elements. It tapers from a 1.5-3.0"? (3.8-7.6 cm). It has a hollow core so it can be attached to a large anvil with the right connections. Overall length is 15"? (38 cm). Net weight is 5 lb 11 oz (2.6 kg).