LCD displays measuring data and makes direct and correct adout with resolution of 0.01mm Carbide-tipped measuring faces Origin setting, mm/inch conversion, switch of absolute measurement and incremental measurement data output For measuring the root tangent length of spur and helical gears and thickness of thin board Ratchet ensures invariable measurement and accurate repeatable reading 1× SR44 battery 1) Measuring Range: 0-25mm, Resolution: 0.001mm, Permissible Error:0.004mm 2) Measuring Range:25-50mm, Resolution: 0.001mm, Permissible Error:0.004mm 3) Measuring Range:50-75mm, Resolution: 0.001mm, Permissible Error: 0.004mm 4) Measuring Range:75-100mm, Resolution:0.001mm, Permissible Error:0.005mm