Champion Spark Plug Gap Gauge Tool
This handy tool makes it easy to verify or set the gap on spark plugs. Only 1 1/2" in diameter (38mm), this gauge ranges from .020" to .100" ( 0.6-2.4mm ) and has a beveled round hole for opening gaps.
Also easy to carry on a key ring, don't be caught without a way to gap your plugs!
Works on Champion plugs, but also will work for NGK, Denso, Bosch, and Autolite too! Not recommended for fine wire plugs.