Bench Basics Ring Stretcher / Reducer

The Durston Ring Stretcher is a professional jewelry repair tool designed to increase ring size and reshape ring bands quickly and accurately. Built with Durston’s precision engineering, this heavy-duty tool allows jewelers to stretch ring shanks evenly using a tapered mandrel system.

The stretcher expands the ring by pressing it onto a six-spline hardened steel mandrel, gradually enlarging the band without distorting its shape. Many models also include a reducing plate with multiple dies, allowing jewelers to reduce ring size or reshape distorted bands.

Constructed from powder-coated cast iron, the tool is designed for long-term durability in professional jewelry repair workshops. The base includes mounting holes so it can be securely attached to a workbench for stable operation.

Key Features

• Six-spline hardened steel mandrel for precise ring stretching

• Double-sided reducing plate with multiple dies for resizing rings

• Capable of resizing rings from approximately US size 2 to 14

• Can reduce bands up to about 12 mm wide

• Heavy-duty cast iron construction for durability

• Bench-mountable design for stability

Applications

• Enlarging ring sizes

• Reducing ring sizes

• Reshaping bent or distorted rings

• Professional jewelry repair and resizing

Product Specifications

• Brand: Durston Tools

• Tool Type: Ring stretcher / reducer

• Mandrel Type: Six-spline tapered mandrel

• Reducing Dies: 16 countersunk dies

• Material: Cast iron frame with hardened steel components

• Typical Weight: ~9–10 kg depending on model