Features: 1. The tool can be used for jewelry ring expansion and shrinking, dual purpose. 2. Normally it can expand half size of the ring, shrinking only for smooth polished ring. 3. Smooth surface of the operating shaft, comfortable hand feeling and labor saving. 4. Easy to operate, put the ring on the shaft and then slowly press down the operating shaft. 5. Scale design on the tool can make the operation more precise. Specifications: Material: Metal Application: Jewelry Tool, Ring Expander Reducer Weight: Approx.9050g/319.23oz Package List: 1 * Ring Expander Reducer 1 * Hex Wrench Package List 1The tool can be used for jewelry ring expansion and shrinking, dual purpose. 2Normally it can expand half size of the ring, shrinking only for smooth polished ring. 3Smooth surface of the operating shaft, comfortable hand feeling and labor saving. 4Easy to operate, put the ring on the shaft and then slowly press down the operating shaft. 5Scale design on the tool can make the operation more precise.