Electronic Digital Micrometer, 0 - 1" (0 - 25 mm) Range, 0.00005" (0.00127 mm) ResolutionLarge LCD display provides easy to read numbers Carbide tipped measurement surfaces Resolution to 5 decimal places Linear accuracy: + . 0001" (. 003 mm) Inch millimetre conversion Includes calibration wrench Zero at any position Lock screw to hold mechanism in position Automatic OFF button Includes: Thimble ratchet, two 1. 5 V batteries, type LR44, wooden storage case with foam insert Measuring Range: 0 1" (0 25 mm) Resolution: 0. 00005" (0. 00127 mm)