1PROFESSIONAL AND UNIVERSAL: This is a professional universal reamer cylinder spark plug thread repair tool, and which is a comprehensive kit 2FOR ENGINES AND GENERATORS: Can make your maintenance work easier, effective and convenient, especially suitable for gasoline engines, generators, diesel engines and other machines 3QUICKLY AND EFFECTIVELY REPAIR: This is a very practical and efficient spark plug thread repair tool set, designed to help quickly and effectively repair damaged spark plug threads and prolong the service life 4USEFUL AND CONVENIENT: Universal size is suitable for repairing spark plug thread M10x1.0, very useful and convenient 5GOOD QUALITY STAINLESS STEEL MATERIAL: Good quality stainless steel material and galvanizing process ensure that the products you buy are durable Item Type: Spark Plug Thread Repair toolThreaded Pipe Size: M10x1.0 (thread diameter x pitch)Threaded Pipe Length: Approx. 17.5mm / 0.69in, 12.5mm / 0.49in(Each 5pcs)Threaded Pipe Material: Stainless steelTap Size: M12x1.0 (thread diameter x pitch)Tap Material: High speed steel . 1 x M12x1.0 Tap10 x M10x1.0 Threaded Pipe