Spark Plug Gap Tool, WMLBK Spark Plug Caliper Universal Spark Plugs Gapper Gapping Kit Compatible with Most 10mm 12mm 14mm Spark Plugs, Red

Made of aluminum with red anodizing. It is a quality tool. The threads on the adjusting dial are smooth and accurate. I now use this tool to gap all plugs I replace. Yes, it is cheaper to "tap the plug on your tool chest or the ground" but that's a crap shoot if you tapped it too hard and closed up the gap too much! This tool only closes the gap on your spark plug. It can,t open them. This spark plug gap tool is compatible with most 10mm 12mm 14mm threaded spark plugs. It doesn't come with a feeler gauge.