Presidium OTI All-In-One Diamond Tester Casting Machines & Equipment Two different size mandrel holes

Two different size mandrel holes to position ring and forming mandrels at the bench

or otherwise attached to a wood frame

this control gives jewelers and metalsmiths convenient countertop-level operation—allowing you to override the automatic start feature on compatible Superflow models or to easily start and stop the PGR without reaching for the unit itself

6mm Jaw Length 31mm Maximum Wire Gauge 16 gauge (dead-soft wire) Maximum Sheet Gauge 24 gauge Variants Single version — no size or style options

Presidium OTI All-In-One Diamond Tester Casting Machines & Equipment Two different size mandrel holesThe Presidium OTI All In One Diamond Tester combines dual optical and thermal testing technology into a single probe, delivering fast, reliable diamond authentication for professional jewelers and gemologists. This versatile instrument distinguishes natural diamonds from lab grown diamonds, moissanite, and common simulantsincluding glass, sapphire, and cubic zirconiawhether the stone is loose or mounted in any jewelry setting. With a resistive