Rectangular Ring Mandrel, Steel Forming Tool, 13" — 6 x 8 mm & 15 x 20 mm

This steel rectangular ring mandrel provides a solid form for shaping and sizing square-edged rings, preventing unwanted distortion during hammering.

What it does

This tool ensures your rectangular wire maintains its precise four-sided profile as you hammer it into a ring shape. Unlike round mandrels that encourage ovalisation, its flat surfaces guide the metal, preserving crisp corners. The hardened steel construction is built to endure repeated hammer blows, and the smooth, polished faces prevent any surface marring on your precious metalwork. Its substantial weight provides stability for accurate forming.

How to use it

• Secure the mandrel firmly in a vice.
• Drape your bent rectangular wire around the form.
• Hammer the wire gently to shape and size the ring.

Who it's for

Essential for UK bench jewellers and silversmiths specialising in contemporary designs, this mandrel replaces guesswork when forming square or rectangular profile rings. It’s also ideal for apprentices and students learning to master these specific shapes, ensuring consistent results from the first attempt. Wire workers can also use it for creating geometric components.

What's in the box

One steel rectangular ring forming mandrel.

Our promise

UK-stocked at our Birmingham workshop. Same-day dispatch on orders placed before 2pm. Free UK delivery on orders over £30. 30-day returns — try it at the bench.