100% 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. Easy to use and operate. Come and have a try. Specifications: Material: Carbon Steel Color: As picture shown Small Tap Size: M10 * 1.0 / M12 * 1.25 Big Tap Size: M14 * 1.5 / M18 * 1.5 Weight: Approx. 230g Package Included: 2pc Spark Plug Re-thread Tap.