Presidium OTI All-In-One Diamond Tester Casting Machines & Equipment This Extended Set Plus represents

This Extended Set Plus represents that remaining stock — consolidated into one comprehensive package for shops that want broad fixture coverage from a system that is no longer in production

A C-clamp is required to secure this vise to a Foredom drill press or other drill presses

These are not traditional cut files — they are ceramic-coated burnishing and finishing tools shaped like needle files

ranging from Extra Extra Extra Coarse (120) through Extra Fine (1500)

Presidium OTI All-In-One Diamond Tester Casting Machines & Equipment This Extended Set Plus representsThe 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