Scope of application ------- Spark plug repair kit tightens new high-quality spark plugs, taps and inserts. Suitable for size 14MM. If you do not know the size, measure it first. Focus on the details of the change. It is a high-performance modification accessory. Exquisite craftsmanship ------- Spark plug thread repair kit A good set of tools for repairing damaged spark plug threads and extending the life of the spark plug. Convenient and practical, improve work efficiency Spark plug repair Four sizes -------- Spark plug thread tools are available in four insert sizes, suitable for various 14mm threaded spark plugs. Tap size: 73*24*11mm/2.9'' * 1'' * 0.4'', Spark plug sleeve thread diameter: 14mm / 0.55'', Thread pitch for spark plug installation: 1.25mm / 0.049'' 39'High quality material --------- This accessory is made of hardened carbon steel, which is strong and durable. Easy to maintain spark plug caps reduce your replacement costs and extend the life of your car's spark plugs. Easy to install --------- M14 spark plug threads easy to use and operate. Package includes: 1 * redirected tap, 4 * spark plug core. You can directly replace the old or damaged ones without damaging your car. Professional installation is recommended. Item weight ??150g