@quickmechtools: There was a time when gaping a spark plug (something that doesn't come up very often) that involved rummaging around in the tool box for the feeler gauges. And there it would be, all rusted up, partially bent, some broken, many unreadable due to corrosion or wear. This Toolwiz Universal Spark Plug Gap Tool is a way to change all that. It is so "pretty" that it belongs in a jewelry box or equivalent. Is this tool necessary? Probably not, but it sure is nice to have around, and it definitely takes the guesswork out of the chore.