Durston Square Ring Mandrel 4mm – 10mm

Wing Wo Hong Industrial Products Ltd Verified independent store

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The Durston Square Ring Mandrel with sizing from 4mm to 10mm is made from hardened steel, hardened to 64 RC through induction hardening. It is left unmarked, ground, and polished t o provide long-lasting durability and precision. This mandrel is designed for accurate shaping and sizing of square-profile rings, offering reliable performance for professional jewelers in workshops or factories. It weighs approximately 100 grams and is built to last many years in demanding work environments. Show more