Steel Ring Stretcher Finger Wedding Band Resizer Tool Jewelry Sizing Tool Stainless Steel Color 2.5x2.2x1.25cm Material: High quality circular size measuring tools, our circular measuring instruments and circular size measuring instruments are carefully crafted from high-quality stainless steel, with unparalleled durability and lifespan. Function: First place the ring on the stepped collet, choose the size that the rings fit onto and then place the expansion collet on the base. Then insert the tapered pin rod and gently tap the top with a hammer. The mandrel can be removed by simply wiping the opposite end. Ring Enlarger Tool: Say goodbye to tedious and annoying resizing methods just use ring mandrel. This jewelry ring size adjuster is designed to fit seamlessly into your workspace and make your work easy in little time. Size：Handle: about 25mmin diameter, 22mm thick, hole: 12.5mm. 1pc;flat round finding: about 24.5mmin diameter, 95mm thick, hole: 12~13mm. 1pc;Our ring measurement tool can easily store when not in use, maximizing your workspace efficiency. Precise:Expanding mandrel offers a high level of precision when making rings. Designed to be used in a lathe. Also fits in drill chuck.it has higher strength, to deformation compared to ordinary steel.