Description
The Durston Ring Stretcher Mandrel (Medium) is a compact and portable tool designed for easy enlargement and resizing of rings, especially suited for jewelers who require mobility. This model features a diameter range of 17.5mm to 20.5mm and an overall length of approximately 92mm. The mandrel can be secured in a vice or clamp, or used with a lathe or polisher. To use, place the ring over the end of the mandrel and tighten the center bolt using the supplied Allen key, which expands the splines to stretch the ring evenly. The stepped mandrel ensures controlled, uniform stretching with minimal risk to the ring. This design is well suited to plain bands or commercial resizing for metals such as gold, silver, and platinum, offering precision in a compact, easily stored format.