Features 1. Universal Fitment: This spark plug gap tool is designed for use with 10mm, 12mm, 14mm, and 16mm spark plugs. Use a feeler gauge of your desired thickness to set the gap accurately. 2. Good Compatibility: Compatible with NGK 6061, NGK 5671A, NGK BKR9EIX, and similar spark plug models. 3. Professional Design: The tool helps achieve the correct spark plug gap. Simply place the spark plug on the appropriate section of the tool to adjust the gap. 4. Maintenance: If the tool becomes wet, dry it thoroughly using compressed air and apply a light lubricant to help extend its service life. 5. Gap Adjustment Tip: When adjusting the gap, account for material rebound. For a target gap of 0.44mm, set it slightly narrower at 0.42mm to achieve the desired measurement after release. Specification Item Type: Spark Plug Gap Tool Material: Metal Fitment: Universal for 10mm (0.39in), 12mm (0.47in), 14mm (0.55in), and 16mm (0.63in) spark plugs. Compatible with NGK 6061, NGK 5671A, NGK BKR9EIX, and similar spark plug models. Not compatible with 18mm thread or extended-reach spark plugs. Package List 1 x Spark Plug Gap Tool