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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 steel. 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!
WARNING:
California's Proposition 65
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| Shape | Round |
| Material | Solid Steel |
| Groove | No |
| Markings | Yes |
| Ring Sizes | 1-16: 1/4 Size Increments |