Originally Posted By: jcwit
BTW, so many say the coin tool is no good, well its worked for me for 50 years with no problems, just know how to use it, and yes I know how to measure items with close tolerances, I was a tool & die maker by trade till I retired.
+1 the coin tool works well in the right hands. I do prefer the wire though, or stacking feeler gauges together if needed.
As a side note plug gaps need to be checked and adjusted. Sometimes the boxes fall on the floor in the store and get knocked closed a little. Also while many people open boxes and find plugs gapped correctly, there are certain plugs that have more than one application, and different gaps for different applications. Sometimes you get lucky, sometimes you don't.