Suitable for M3, M4, M7, M9 and M11, creates a stronger internal thread in soft metals and protects tapped threads against wear and damage. This repair kit includes insert installations, wire thread inserts, 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. Made of premium quality material, reliable and durable for a long time use.