Made from hardened stainless steel, this caliper features both inch and metric capabilities and floating zero. Accurate plus or minus 0.00005" and runs off a 357/303 battery. Includes a hard plastic case. FeaturesResolution: 0.0005"Hardened stainless steelSwitchable inch/metric resolutionFloating zero and relative measurements as well as absolute measurementsBattery is a single type 357/303, 2 year lifeABS scale reads true positionNo rack, no pinion - linear scale is imbedded in epoxy