Durston 2125 Small Ring Stretcher Mandrel Gemological Instruments Consistent shape supports even compound

Consistent shape supports even compound application and uniform polishing results

0mm 201-131PO 14K White

and DRM 150) in both reduction gear and non-reduction gear configurations

and burns out with low ash for reliable investment casting results

Durston 2125 Small Ring Stretcher Mandrel Gemological Instruments Consistent shape supports even compoundThis small expanding ring stretcher mandrel is designed to enlarge and size rings in the 1417 mm range, in a compact format that tucks easily into a drawer or travel kit. Once clamped, the mandrel expands smoothly as you tighten the center bolt, nudging the shank out to size in small, controlled steps. Features Compact expanding mandrel sized specifically for smaller ring diameters. Stores easily in a drawer, toolbox, or roll, ideal for mobile or