Ring size measurement rod is made of aluminum alloy.Light, , and portable.27 finger size measurement instruments are made of stainless steel.The workmanship is fine, the edges are smooth and not hurt your hands.The soft rubber hammer has two sides, and the rubber not leave traces on the jewelry or damage your jewelry. The ring core shaft size device is made of aluminum material, the size of the US and British standards, and it is easy to read on the core shaft, which is suitable for full size and half size;American size (0-13), with a half size and a flexible cable connected with screws, can be easily opened. The ring size measurement tool is a built -in magnifying glass at the buckle, which is designed , which is convenient to read the balance quickly.After upgrading the materials, it has perfect flexibility, and it not be too hard. used to fix and adjust the ring.The cleverly designed soft rubber can protect your precious jewelry from being worn. 1 aluminum ring size measurement tool, US British standard.Two rings are belt, black and white.27 metal size ring sets, 0-13 yards.1 double -headed jewelry hammer is used to fix and adjust the ring. Colour: Material:Metal Package Contents: 1set x ring sizer measuring tool Only the above package content, other products are not included. Note: Light reflection 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.