The Presidium PDG gemstone gauge is similar to the Leveridge gauge as a millimeter gauge, a weight estimator, and a ring size measure but with several differences. Made of components manufactured in Switzerland, the gemstone gauge is 20% lighter than the original leverage gauge and has a smoother action, patented nonstick rack and pinion slide. Precise measurements from 0.0 to 23.0 mm with 0.1 mm accuracy. Includes: gauge, case, booklet, and attachment. Swiss components assembled in Singapore.