Gauge Ring Stick 1-33

With measurements in mm and inches.

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

For measuring diamonds and stones. Capacity 0.10 to 4 carats

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