This thread repair kit is the perfect solution to a damaged or stripped tapped hole. Suitable for M3 M4 M7 M9, creates a stronger internal thread in soft metals and protects tapped threads against wear and damage. This repair kit includes rt installations, wire thread rts, twist drill bits, thread taps, lug breaking tools. With package case, convenient to store and carry, you can easy and fast to collect and take out. If you have any questions about the product, please feel free to contact us via email.