Durston 1312 Quad Jump Ringer Ring Sizers & Stretchers Center slot produces cuts with

Center slot produces cuts with perfectly parallel walls

long-term use

Split design provides outstanding visibility of the workpiece during polishing

Suited for jewelers

Includes sealing gasket for proper boiler housing seal

Durston 1312 Quad Jump Ringer Ring Sizers & Stretchers Center slot produces cuts withThe Durston 1312 Quad Jump Ringer is a professional jump ring making machine designed for jewelers and metalsmiths who need to mass produce jump rings efficiently. Compatible with a Foredom No. 30 style handpiece and flex shaft machine, this system lets you produce jump rings from soft, non ferrous jewelry wire including gold, copper, and silver. Wire as thick as 13 gauge (1. 85 mm) can be used, and the inside diameter of finished rings ranges from 2.