Quality Materials: Our spark plug thread repair kits are made from high quality high carbon steel. They are resistant to oxidation and corrosion and provide superior performance and durability. We have optimized the quality to withstand greater stress and damage. Thread Repair: The spark plug thread and ignition blade repair kit is very easy to use. It provides thread cutting to repair stripped or damaged spark plug threads and repair spark plug configurations on aluminum cylinder heads to extend spark plug repair time. High Strength: Our carbon steel spark plug thread repair kits are manufactured under strict quality control standards, improved design, advanced manufacturing technology and more durable products. With a full range of tools, you only need this kit to repair threads, no other complicated tools are needed. Easy to Use: M14*1.25 Thread Repair Kit Just make sure the spark plug head is aluminum and this tool will do the job. Anyone can use it and it is easy to handle. Additionally, the socket includes a metal holder to hold the spark plug inside during installation and removal.