【Thread Repair】The spark plug thread repair kit is very easy to use. Use it to cut threads and repair broken or damaged spark plug threads, as well as to repair spark plug assemblies in aluminum heads. Only this tool set is required for thread repair; no other complicated tools are required. Anyone can use it without difficult operations. 【Easy to Use】The M14*1.25 thread repair kit is suitable for repairing spark plugs. Just make sure the spark plug heads are made of aluminum, and this kit will do the job. To simplify application, you can also add a thread locking compound (not included in the kit). In addition, the socket features a metal retainer to hold the plug inside during installation and removal. 【Kit Contents】The kit includes a 14 mm 12-point cutting reamer (can be used with a ratchet or 3/8-inch wrench) and 4 blades, sizes are 3/8", 7/16", 1/2", and 3/4". The tools are complete and easy to use. 【Premium Material】Our spark plug thread repair kits are made of high-quality