Steel Ruler 12”

Size: 1½ to 3⅜”; Reversible 1 - 27

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

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.