Anytime Tools 2" - 6" ELECTRONIC DIGITAL PRECISION ENGINE CYLINDER HOLE BORE GAUGE GAGE - RESOLUTION 0.00005" Reviewhttp://tinyurl.com/oseznbg Anytime Tools 2" - 6" ELECTRONIC DIGITAL PRECISION ENGINE CYLINDER HOLE BORE GAUGE GAGE - RESOLUTION 0.00005" Inch / Metric Range 2" to 6" diameterMeasures bore to 10" deepAnalog bar display with adjustable rang and tolerance indicatorsConvenience to indicate measurements whether out of set tolerance or notResolution: 0.00005". Super large LCD screen