Features: This thread repair kit is the perfect solution to a damaged or stripped tapped hole. Suitable for M4, 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. Specification: Material: Steel Color: Silver Thread Quantity: 25 Package Size: 18 * 12 * 3cm / 7.09 * 4.72 * 1.18in Package Weight: 150g / 5.29oz Package List: 1 * Metric Thread Repair Insert Kit ( as the picture show )