Standard Grooved & Graduated Ring Mandrel

This specialized ring mandrel features a longitudinal groove designed to accommodate the "set" of stone-set rings, allowing them to be measured and shaped without putting pressure on the gemstones. It is graduated from US size 1.0 to 15.0 and is made from high-quality hardened steel for long-term durability. The groove is a vital safety feature for any repair jeweler, as it prevents the mandrel from crushing prongs or dislodging stones during resizing and forming tasks. This is a must-have tool for the professional stone-setting and repair department.