*KeyFeatures *Built to Last: This helicoil thread repair kit features drill bits and taps made from premium steel, heat-treated to HRC 55-62 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 Metric & SAE Kit: This metric and SAE helicoil kit is the ideal solution for restoring damaged threads, perfect for engine repairs and other automotive applications. It includes 338 pieces, including twist drills, taps, thread inserts, breaking pin tools, installation tools, and a hex key. Designed to accommodate both metric and SAE sizes (M5, M6, M8, M10, M12, 1/4", 5/16", 3/8", 7/16", 1/2"), it ensures compatibility with most component specifications for daily work requirements. *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. *Convenient Storage Case: The heli coil thread repair kit includes a carry case to keep all your thread repair tools neatly organized and allows you to easily transport the kit from one job to the next, ensuring a hassle-free experience. ******************************************************************************************************* *Specifications Item Model Number: XRGY338 Quantity: 338 Pcs Main Material: HSS Specifications: SAE: 1/4", 5/16", 3/8", 7/16", 1/2"; Metric: M5, M6, M8, M10, M12 Main Color: Red, Blue & Black ******************************************************************************************************* *Pakcage Content 1 x Thread Repair Kit 1 x User Manual