Feature:1. Universal Fitment: This spark plug gap tool is universal for 10mm 12mm 14mm 16mm spark plugs. Use your desired size feeler gauge for gap thickness.2. Good Compatibility: Spark plug gap tool is compatible for NGK 6061, for NGK 5671A, for NGK BKR9EIX and similar spark plugs.3. Professional: The spark plug gap tool will give you the perfect gap every time, just place the spark plug on the gap tool.4. Maintenance: If the spark plug gap tool gets wet, dry it with compressed air and apply lubricant to prolong its life.5. Bounced: If your clearance target is 0.44mm, we recommend 0.42mm, so you'll get 0.44mm when it bounces back.Specification:Item Type: Spark Plug Gap ToolMaterial: MetalFitment:Universal for 10mm/0.39in, 12mm/0.47in, 14mm/0.55in, 16mm/0.63in Spark Plugs.Compatible for NGK 6061, for NGK 5671A, for NGK BKR9EIX and similar spark plugs.Not compatible with 18mm thread and longer style spark plugs..Package List:1 xSpark Plug Gap Tool