Scope: spark plug repair kit new high quality spark plugs, tighten taps and inserts. Suitable for size 14MM. If you don't know the size, please measure it first. Focus on the details of the change. It is a high performance modification accessory. Exquisite craftsmanshipSpark plug thread repair kit A good tool kit to repair damaged spark plug threads and extend the service life of spark plugs . Convenient and practical, improve the work efficiency of spark plug repair Four sizesspark plug thread tool are four plug-in sizes, suitable for different 14mm thread spark plugs . High quality materialsThese accessories are made of hardened carbon steel, strong and durable. Easy to maintain, spark plug tap reduce your replacement cost and extend the life of car spark plugs Easy to installEasy to use and use m14 spark plug thread. The package includes: 1*rethreaded faucet, 4*spark plug insert. You can directly replace the old or damaged ones without damaging your car.Professional installation is recommended Features: Material: Carbon Steel Socket Size: M14*1.25 (9mm length) M14*1.25 (11mm length) M14*1.25 (16mm length) M14 *1.25 (20mm length) Spark plug insert wire diameter: 14mm/0.55'' Spark Plug Thread Pin: 1.25mm/0.049'' Package Included: 1*Re-thread Tap 4*Spark Plug Inserts