This is the nicest ring mandrel we carry, made with a very high level of quality and precision. You will find one of these in almost every jewelry store. This solid steel jewelers mandrel is used for shaping, sizing and straightening rings. Also for gauging and holding rings while setting stones. Made of hardened tool steel. The handle is textured for maximum grip and control. Mandrels are laser engraved with ring sizes from 1 to 15 in 1/4 size increments and measure 13" long. This model also features a groove down one side of the mandrel, which not only keeps it from rolling but also helps with setting stones.