Gauge Rings Metal Flat (2mm thick)

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

K&B Diamond and Stone Gauge.
Measures loose or mounted stones from 3 points to 4 carats.
Birthstone chart on reverse.

0.001 to 5ct

15mm Capacity; Graduations 1 to 10mm;
Throat 20mm.