Digital Micrometer Features Include... Carbide measuring faces 0-1" / 25mm Measuring Range 0.00005" / 0.001mm Resolution Chrome plated frame Standard included above 0-1" range. Inc./Abs. measuring Spindle dia: 0.250" Accuracy: 0.00016" Friction Thimble Spindle lock Certificate of Calibration traceable to NIST Furnished in fitted case