Plastic Finger Size with 15 Rings

Holes are used to measure stones and extensions are used to measure mountings. Gauge has mm and carat measurements.

Reverse side is metric carat measurement.Capacity: Diamond - 0.02 to 6 carats Pearl - ½ to 40 grains

Carbide tipped measuring faces parallel, ground and lapped. Stainless steel spindle for rust prevention, heat resistant grips and calibration is laser etched.