Durston 2125 Small Ring Stretcher Mandrel Gemological Instruments and burns out with low

and burns out with low ash for reliable investment casting results

SC-X contains a higher percentage of cristobalite

the AGILO SHARP-M performs light shaping and pre-polishing

Consistent shape supports even compound application and uniform polishing results

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

Durston 2125 Small Ring Stretcher Mandrel Gemological Instruments and burns out with lowThis 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