The Durston PrecisionFit™ Steel Marked Ring Mandrel is hardened to 64RC to ensure a solid base for your work. The PrecisionFit™ system ensures your 1-16 ring sizing is right every time – no more cross-referencing with inaccurate ring sizers and mandrels.
Machined, hardened, ground & engraved to a perfect finish at Durston's UK factory, to ensure 100% accuracy. Each mandrel is put through rigorous PrecisionFit™ Quality Control System to ensure accurate 1-16 sizing (in quarter sizes).
All PrecisionFit™ mandrels are created with ergonomically designed handles to provide a firm and comfortable grip. Manufactured from steel with a length of 360mm.