Pepetools&trade

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Gold Standard Calibrated Ring Mandrels are marked with ring sizes 1-16 in half-size increments and are available in either aircraft-grade aluminum or induction-hardened, polished s teel. Grooved models are for use with rings mounted with stones; models without grooves are for unmounted rings.Only PEPETOOLS Gold Standard Ring Mandrels are calibrated to ISO specifications and laser-scanned to be accurate within +/- 1.5μm.Protective re-usable case included with purchase! Show more