This thread repair kit is a game-changer for anyone in the automotive industry. As a result of my tests, i determined that it is efficient and reliable in repairing threads. The kit comes with a 9.2mm guide that ensures precision during the installation process. the thread inserts are durable and have high-quality threading that guarantees a strong grip. However, the kit can be expensive for some buyers... In general this is an excellent product worth investing in..