Features: Absolute encoder eliminates zero setting on power up Fine adjustment to allow precise movement of the slider Internal measurement jaws are rounded to provide accurate measurement of internal diameters The minimum internal diameter measurement capability of 20mm Absolute ...Features: Absolute encoder eliminates zero setting on power up Fine adjustment to allow precise movement of the slider Internal measurement jaws are rounded to provide accurate measurement of internal diameters The minimum internal diameter measurement capability of 20mm Absolute and incremental measuring modes Jaw thickness: 0.138" Hardened stainless steel construction Inch/Metric conversion Thumb wheel Short form Calibration Certificate included Furnished in fitted case D.O.T.