SPI Long Range Electronic Calipers Features include... 0-24" / 600mm Measuring Range 0.0005" / 0.01mm Resolution Jaw Length: 3.9" / 100mm SPC Output via USB Cable Absolute Encoder SPC Output 4-Way Measuring: Inside, Outside, Depth & Step Hardened stainless steel construction Includes Certificate of Calibration Supplied in fitted storage case