This precision ring sizer set includes an aluminum ring mandrel measuring rod for US sizes 1-15 and European sizes 41-76, a rubber mallet for shaping, a 27-piece ringDimension measurement tool (US size 0-13 half size, negative number indicates half size) and two polished cloths. The ring mandrel and ring size meter are made of durable aluminum and stainless steel, providing long-lasting anti-rust properties with smooth edges for comfort in use. The ring-made finger core comes with clear full-size and half-size indicators to help you measure the ring size quickly and accurately. The included rubber hammer is designed with a double-sided design, which is perfect for shaping and adjusting the rings without causing any damage or leaving any traces to the jewelry. Great for measuring wedding rings, adjusting bend rings or making new pieces, this ring measuring instrument and ring size measuring instrument is versatile and easy to use, suitable for jewellery lovers and professionals. Colour:As Shown Material:Metal Package Contents: 1set * ring measurer 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.