Presidium Electronic Gemstone Gauge A convenient digital gauge with precise accuracy, to measure gemstone dimensions and gives direct carat conversion (with precision to 3 decimal places) for round brilliant-cut diamonds. Its touch button zeroing allows the convenience of resetting to zero at any measurement point. An attachment for high-setting jewelry provided as an accessory. Compact protective case included with auto-magnetic power off when placed in carrying case. Operates on 1 x CR2032 cell (included).

The specifics:

• Capacity- measures from 0.0 to 25.0 mm.
• Accuracy of 0.01mm / 0.02mm.
• Direct digital millimeter/carat readout.
• Touch button zeroing that allows the convenience of resetting to zero at any measuring point.
• Smooth slider mechanism.