For use in setting corerct head clearance on units. See our guides here for how to use. 
Range: 0 to 22" (with included 6 extension rods 1", 2", 3", 4", 5", 6") Resolution: 0.0005"
Super high precision dial indicator - double the accuracy of regular indicators
Indicator Gauge conforms to AGD standard and Federal Accuracy specifications
Indicator can be mounted on center or side of base. Base is 4" long.
Includes 10 attachments (6 extension rods and 4 feeler points)