Accurate Gemstone Setting Gauge Set of 18

Gauge will measure diameter and circumference in mm and inches. Hollow cavity to store work tools like files, tweezers, gauges, etc.

Allows you to estimate the size of diamond without removing it from mounting. Measure girdle diameter and use the conversion booklet provided.

Nickel plated steel with roller adjustment. One edge is graduated in inches reading ½” in ½” in 1/16” divisions and other edge in metric scale from 0 to 120mm in 1mm divisions.