SPI Electronic Snap Cal Specifications include... 0-1.2" / 30mm Measuring Range .0005" / .01mm Accuracy: + .0015" / .03mm Jaw Length: 1-3/16" Features include... Includes Certificate of Calibration Wide Jaw for easy use Direct in / mm conversion Hardened stainless steel construction. Large, high contrast LCD display Hanging loop included for attachment to belt or chain