GRS 004-489 Brass Channel Ring With Holes Sold by the Piece Prop 65 - Lead Stepped aluminum mandrel — not

Stepped aluminum mandrel — not tapered — for precise ring sizing

Auto drain and waste bottle

and all Quatro Velocity Series machines

a bent stamp is recommended instead of this straight style

GRS 004-489 Brass Channel Ring With Holes Sold by the Piece Prop 65 - Lead Stepped aluminum mandrel — notThe GRS 004 489 Brass Channel Practice Ring is a precision made training blank designed for jewelers and stone setters to develop and refine channel setting skills. Made from solid brass, this ring features evenly spaced pre drilled holes sized for 3 mm stones, enabling consistent, repeatable practice without consuming precious metals or materials. Features Solid brass construction durable and well suited for practice and demonstration use Pre drilled