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