Built to Last: This helicoil thread repair kit features drill bits and taps made from premium steel, heat-treated to HRC 50-60 for superior durability. The kit includes more metal thread inserts, each crafted from high-strength 304 stainless steel, ensuring longevity and reliability for all your repair needs.

Comprehensive Kit: The metric helicoil kit is ideal for restoring damaged threads and is perfect for engine repairs and other automotive applications. It includes 166 pieces: 145 thread inserts, 5 twist drills (5.2mm, 6.3mm, 8.3mm, 10.5mm, 12.5mm), 5 taps (M5x0.8, M6x1.0, M8x1.25, M10x1.5, M12x1.75), 5 breaking pin tools, 5 installation tools, and 1 hex key. All metric sizes match most component specifications and are ready to meet daily work demands.

Easy to Use: Designed for simplicity, this thread repair kit allows you to drill, tap, insert the coil, and break the tang to restore the thread—quickly and efficiently. Plus, the insert tool with a rubber-coated grip ensures a comfortable and reliable hold during work, which is ideal for mechanics, auto repair workers, and DIY enthusiasts.

Wide Application: This helicoil repair kit is specifically designed to fix stripped, damaged, or worn threads in a variety of materials, including aluminum, iron, carbon steel, bronze, magnesium, and more! Suitable for machining, automotive repair, and equipment maintenance.