3109-75A ELECTRONIC OUTSIDE MICROMETER 50-75mm/2-3"• Resolution: 0.001mm/0.00005 • Buttons:on/off, data set, mm/inch, ABS/INC • SR44 battery, with one spare battery, auto power off• Ratchet friction thimble, carbide tips • DIN863 • With battery cover wrench and spare spherical anvi • Supplied with standard rods • Packed in plastic box or wooden box.