Digital calipers offer 4 measuring capabilities: outside dimensions, such as diameters, measured with the large jaws, inside dimensions measured with the smaller jaws, depth measurements with the extending rod, and step measurements taken from the back end of the jaws. Smooth movement of caliper with very accurate measurement along the entire travel Large LCD Numerals for easy reading in 5 Digit display with resolution of .0005"/0.01mm Measurement data can be output through SPC interface port to computer 3 function button: On/Off, Zero reset, Inch/mm conversion 1 SPC output port Firm and crisp response feel on all 3 push buttons, unlike the sof Mfg: Sinclair International