Features: 1.100% new and high quality spark plug re-thread tap and inserts 2.A nice tool kit for repair damaged spark plug threads and lengthen spark plugs service time 3.Made of hardened carbon steel, these accessories are of strong strength and long durability 4.With four size of inserts for different 14mm thread size spark plugs 5.Easy to use and operate. Come and have a try Specification: Features:_x000D_ _x000D_ 100% new and high quality spark plug re-thread tap and inserts. _x000D_ A nice tool kit for repair damaged spark plug threads and lengthen spark plugs service time. _x000D_ Made of hardened carbon steel, these accessories are of strong strength and long durability. _x000D_ With four size of inserts for different 14mm thread size spark plugs. _x000D_ Easy to use and operate. Come and have a try. _x000D_ _x000D_ Specifications:_x000D_ Material: Carbon Steel_x000D_ Color: As picture shown_x000D_ Tap Size: 73 * 24 * 11mm / 2.9'' * 1'' * 0.4''_x000D_ Spark Plug Insert Thread Diameter: 14mm / 0.55''_x000D_ Spark Plug Insert Thread Pitch: 1.25mm / 0.049''_x000D_ Spark Plug Insert Thread Length: As picture shown_x000D_ Weight: Approx. 153g_x000D_ _x000D_ Package Included: _x000D_ _x000D_ 1 * Re-thread Tap _x000D_ 4 * Spark Plug Inserts PackageList: