The kit is equipped with expanding ring mandrel, hex wrench and mandrel screw, which are complete accessories to make the operation more convenient and fast, no need to buy other tools additionally. Made of stainless steel, the ring stretcher has good hardness and resistance, which can resist the wear and in long-term use, ensuring the stability and reliability of long-term use. Suitable for ring sizes within the range of 17-24mm/0.67-0.95inch, whether it is to make multiple sizes of rings or to adjust the size of existing rings, the expanding ring mandrel can easily cope with it to meet diversified needs. The stainless steel ring mandrel can be used to stretch soft precious metals such as silver, gold, copper, etc. It is not only suitable for jewelry making and repairing, but also can be widely used in carpentry, construction, engineering and metal forming, showing its multi-functional practicality. The ring stretcher is designed to be compact and , easy to carry and store, and ready to meet daily use and emergency needs whether , in the studio or outdoors, providing convenient support for your and restoration work. Material:Stainless steel Package Contents: 1 set * ring mandrel