Precision mechanism with Ø55mm dial & locking rotating bezel, offering an accurate method of measuring a bore or detecting a taper or ovality. Measuring Range: 50-160mm. Will indicate the deviation from set size by up to 5mm with an accuracy of 0.01mm. Included with the bore gauge: probe body, dial indicator, anvils, spacer rings. Supplied in wooden storage case. Model No. DBG5010