3108-50A ELECTRONIC OUTSIDE MICROMETER 25-50mm • Resolution: metric 0.001mm/ inch 0.00005" • Reading in metric or inch, without mm-in conversion • Buttons:on/off, data se, ABS/INC • IP54 protection • Ratchet stop, carbide tips • SR44 battery, with one spare battery, auto power off • DIN863 • Supplied with standard rods • With battery cover wrench,spare spherical anvil and zero adjusting wrench • Packed in plastic box or wooden box.