Durston Round small stick , Hardened Steel, 365mm/14.25″, 5-20mm Diameter

The Durston Hardened Ring Mandrel – Round 5-20 is a precision-crafted tapered ring mandrel made from the highest quality tool steel. It is hardened to 64 RC, ground, and polished to ensure durability and consistent, outstanding results. This unmarked mandrel measures 365mm long and is capable of sizing rings from 5mm to 20mm in diameter. Designed with ergonomic considerations, it fits comfortably in the hand, providing good support and control during ring shaping and sizing tasks. The mandrel weighs approximately 0.6kg and is built for lifetime reliability in professional jewelry workshops.