OEM Ramp Style Spark Plug Gap Gauge

Ramp style spark plug gap gauge. The OEM Spark Plug Gap Gauge measures spark plug gaps from 0.020 In. to 1 In. (0.50 to 2.5 mm). A hole in the gauge works as an electrode adjuster. This gauge features inch sizes stamped on the front and metric sizes stamped on the back. Attaches to key chain for easy access.