|Allows for quick limit checking of seat rail hole and wear dimensions. Gage elements are made from heat treated blue tempered steel. Each element is marked to correspond to the limits set forth in the relevant ad. The three gage elements are linked together on a universal spiral key ring|
This item has no instructions and it isnt very intuitive. Im an A&P and myself and my IA were unable to figure it out. Better to pay more for something that is actually usable.
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Per Vendor, No. There is no instructions for this product but you would use this gauge as an adjunct to the Airworthiness Directive. This gives you a visual reference to the measurement.