ARP Rod Bolt Stretch Gauges\nCheck connecting rod bolt stretch accurately with ARP rod bolt stretch gauges. They are highly recommended when installing rod bolts and other fasteners where it is possible to measure the length of the bolt after tightening.\n--Provides Facility To Measure Length Of Bolt After Tightening\n--Reads In Increments Of .0005\""\n--Includes Heavy Duty Carry Case\n\nThe ARP Rod Bolt Stretch Gauge provides an extremely useful solution to measure the length of a bolt following tightening.\nThis gauge has been developed to provide optimum accuracy in determining the correct pre-load in the installed rod bolt (reduce the possibility of bolt stress when the engine is under operation). The products main purpose is to assist in properly setting up a rod for resizing, obtaining the proper torque load when installed in the engine, and monitoring the condition of the bolt while in use. This is particularly useful if an engine is internally monitored regularly.\nIncludes he.