Mitutoyo's ABSOLUTE Digimatic Depth Gage can keep track of the origin point once set for the entire life of the battery. Wide probing range is available with the supplied extension rod. Bottom surface of the base is hardened, ground and lapped for highest degree of flatness. With SPC data output. Specifications... 0-8" / 200mm Measuring Range 0.0005" / 0.01mm Resolution 0.001" Accuracy 4" x 0.63" Base Extension Rods included: .5", 1", 2", 4" Functions... Origin-set, Zero-setting, Data output, inch/mm conversion (inch/mm models), Alarm: Low voltage, Counting value composition error Gage Calibration This gage is sold off the shelf without Gage Calibration. If you would like to receive the gage plus a Certificate of Calibration that is Traceable to NIST, please select With Calibration before adding the gage to your cart. The Gage Calibration Service that we offer for this gage is performed by Mitutoyo in their A2LA Accredited Calibration Lab in Aurora IL. The Standard Calibration Service normally takes about 2 weeks to complete before shipping. The method of shipping you select during checkout only applies to the shipping AFTER the calibration service has been completed. In a hurry? Contact us for 5-Day or 1-Day calibration service. Extra fees will apply for expedited service.