Description
The Durston Ring Stretcher Mandrel (Large) is a durable, compact tool made for efficiently enlarging and resizing rings with an outer diameter range of 21mm to 24mm and a total length of 92mm. This portable mandrel is ideal for jewelers working on the go and can be securely fixed in a vice, clamp, or used with a lathe/polisher. To operate, place the ring over the mandrel's end and tighten the center bolt using the included Allen key, expanding the splines for controlled stretching. Its simple, robust design ensures precise results for plain bands or commercial resizing in precious and non-ferrous metals, with convenient storage and transport options.