Metal copper ring rod size chart is easy to read The ring screen mandrel is made of aluminum material. It is light and easy to use, with rolling ring bar design This double-sided rubber hammer can be used to flatten or reinforce wires while minimizing the hammering sensation Very suitable for assembling wedding rings, class rings and other wide rings. With this finger gauge, you will no longer need to look for gauges Very suitable for use on glass display cabinets Graduation ring mandrel The measurable size of the measuring ruler is 38.9 (diameter 12.4) to 74.1 (diameter 23.6) mm, a total of 33 sizes The size error between the ring and the ruler is 0.25. Annular sizing device mandrel is made of stainless steel, American standard, easy-to-read mandrel size chart (for full size and half size) The rubber hammer and metal ring stick and ring adjuster set are perfect sets for jewelers, ring makers, hobbyists and everyday users. For convenience, the annular drill rod has a non-rolling design, so you can place it wherever you want. Colour:Gold + Silver Material:Copper Size:24.5cm Package Contents: 1* Metal copper rod 1* rubber hammer Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.