Extended Range Professional Precision Electronic Bore Gauge Deep cylinder bore gageing to a depth of 10" affords the user the ability to measure out-of-round conditions and tapers of cylinders without the necessity of removing pistons - critical wear area of the cylinder can be reached with this gauge. Features: Range 1.4" to 6" diameter Measure in Inch or Metric with Auto Conversion Measures bore to 10" deep Analog bar display with adjustable range and tolerance indicators Convenience to indicate measurements whether out of set tolerance or not Fast to read Max. / Min. measurement Resolution: .00005" Super Large LCD screen Storage case and extra batteries included Instructions Included