Sealey VOSA Approved Digital Tyre Tread Depth GaugeCalibrated and VOSA Approved for Use When MOT Testing All Classes of VehicleHardened and Tempered Stainless Steel GaugeMetric and Imperial Calibration with Conversion Between the TwoZero Reset Control Allows for Comparative MeasurementIncludes Flat Surface Plate for Accurate Zeroing of Gauge Prior to UseSupplied in Storage CaseRange: 0-10mm (0-0.4")Resolution: 0.01mm (0.0005")Accuracy: ±0.01mm (0.0005")Battery: CR2032 (Supplied)