This ring stretcher tool is made of high-quality steel with a bright chrome-plated surface, featuring shock resistance and wear resistance for long-term stable use. The set includes a multi-step steel chuck mandrel, a tapered pin expander and an alloy base with complete accessories, no extra tools are needed for efficient ring size adjustment. Easy to operate: just put the ring on the mandrel and tap the tool's end to expand. It's recommended to store separately to prevent damage/loss, and not for diamond/gem-inlaid or low-hardness material rings to avoid damage. This ring stretcher tool is made of high-quality steel with a bright chrome-plated surface. It not only has an excellent texture but also features outstanding shock resistance and wear resistance, capable of withstanding bumps and wear in daily use, maintaining stable tool performance for a long time and extending its service life. The tool set includes a multi-step steel chuck mandrel, a tapered pin expander, and a stable alloy base. With complete matching accessories, no additional tools are needed to efficiently adjust the ring size, meeting the expansion needs of different styles of rings. The ring expansion process is simple and easy to understand, requiring no complicated skills. Just put the ring on the mandrel and tap the end of the tool with a small hammer or similar tool to push the mandrel to expand, easily adjusting the ring size with high efficiency and time-saving operation. Considering the protection needs of the tool and accessories, it is recommended to store this ring stretcher tool set separately. The dedicated storage method can prevent damage caused by collision between tools and avoid the loss of small accessories, ensuring the tool set remains intact for a long time. During use, please note that this tool is not recommended for rings inlaid with diamonds or gemstones, nor for rings made of low-hardness materials (such as some soft metals), to avoid gem falling off or ring deformation and damage during the expansion process.