Features:1.99% brand new and high quality spark plug thread insert tap repair tools2.With the size of M10 * 1.0 M12 * 1.25, M14 * 1.5 M18 * 1.53.A nice tool kit for repair damaged spark plug installing threads4.Made of hardened carbon steel, these accessories are of strong strength and long durability5.Easy to use and operate. Come and have a trySpecification:Features:99% brand new and high quality spark plug thread insert tap repair tools. With the size of M10 * 1.0 M12 * 1.25, M14 * 1.5 M18 * 1.5. A nice tool kit for repair damaged spark plug installing threads. Made of hardened carbon steel, these accessories are of strong strength and long durability. Easy to use and operate. Come and have a try. Specifications:Material: Carbon SteelColor: As picture shownSmall Tap Size: M10 * 1.0 M12 * 1.25Big Tap Size: M14 * 1.5 M18 * 1.5Weight: Approx. 230gPackage Included: 2 * Spark Plug Re-thread TapPackageList:nn