Durston 2125 Small Ring Stretcher Mandrel Gemological Instruments and DRM 150) in both

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

Consistent shape supports even compound application and uniform polishing results

With ten distinct brush styles represented and six of each brush included

Use by hand or clamp down for drill press work

Durston 2125 Small Ring Stretcher Mandrel Gemological Instruments and DRM 150) in bothThis 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