RING MANDREL SOLID STEEL JEWELRY MAKING SIZER GROOVED GRADUATED MARKED SIZE 1-15 (LZ 1.9 FRE) NOVELTOOLS JEWELERS RING MANDREL STEEL GRADUATED & GROOVED MANDREL GROOVED FOR STONE SET RINGS GRADUATED 1-15 SIZES RING SIZING MANDREL Jewelers Ring Mandrel is a basic workbench tool for any Jeweler. This steel mandrel is GRADUATED with a GROOVE smooth polished work surface. This Grooved mandrel is used in Jewelry making and repairs for measuring, sizing and enlarging rings - especially for stone set rings. Mandrel is grooved which is designed specifically to use whenever sizing a stone set ring. The groove prevents the impact of hammering on the mandrel while sizing to effect the mounted stone. Round Steel Mandrel is Graduated in US Standard Sizes with number markings ranging from Size 1 - 15, with increments of Full, Half and Quarter Sizes, making it easy to size the ring.