Manual: Simply place the ring on the stretching shaft and rotate to enlarge the size, then press the groove to adjust. Precise adjustment is ensured. 6 Adjustable Size Dies: Includes six precision die sizes ranging from 8# to 25.5# (approximately US size 8-13). Easily enlarge ring sizes while maintaining a perfect roundness without damaging precious metals. Durable: The electroplated finish ensures it remains shiny and new even after repeated use. The robust construction (3.5 kg) ensures stability during and prevents slippage. Suitable for Any Ring: This ring stretcher is ideal for adjusting ring sizes and is widely used in jewelry stores, repair shops, jewelry makers, DIY projects, and personal use. It is suitable for bracelets, sterling silver, platinum, or rings made of any other metal. Service: If you have any questions, please feel to contact us and we will reply within 24 hours!