assurance test, faster response, cheaper and easier to install.No more knocking the plug on a random to close it, and then using a coin to open it back. Do it accurately once with our tool.Foldable feeler gauge for easy carrying and storage.32 pieces of thickness feeler gauge, easy to measure width., Never Used or Installed.Application: Spark Plug Tool: Suitable for most 10mm 12mm 14mm 16mm spark plugs.Feeler Gauge: Measuring range is 0.0015 inch (0.04mm) - 0.035 inch (0.88mm).Vehicle compatibility chart is for reference only. Check product type and size to meet your needs.Colour:As ShownMaterial:Aluminum AlloyPackage Contents:1 * spark plug1 * feeler gaugeOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.