★ 12mm gapper tools temporarily back-ordered until June 10, 2019. 14mm gapper tools ship immediately.
This precision tool is critical to properly and accurately gapping spark plugs. With this tool you will be able to gap plugs faster and maintain accuracy. Available in 14mm and 12mm plug thread sizes. Made in USA.
The optional specialty spark plug feeler gauge has 4 blades in .018, .020, .022, .024 thicknesses.