Features： 1、Premium Materials: This metric thread repair kit includes drill bits and screw taps, heat treated to a resilience of HRC 50?60, solid designed for enhanced durability and longevity. 2、Efficient Design: The 135° drill bits require minimal pressure, making the drilling process easier. Rubber coated installation and tang breakoff tools provide a comfortable and secure grip for efficient and safe usage. 3、Comprehensive Kit: Designed for convenience, this kit includes a variety of sizes (M5, M6, M8, M10, M12) to perfectly accommodate a wide range of automotive and engine repair tasks, particularly for spark plug cylinder insertion. 4、Practical Tool Set: Replace damaged threads with stronger material, this kit not only offers a fix but also an upgrade to the strength and lifespan of threaded connections, enhancing engine's performance. 5、Portable: The provided carry case keeps all your rethreading tools neatly organized for easy transport from one job to the next, ensuring a hassle free experience. Specification： Item Type:?Metric?Thread?Repair?Kit Material: Metal Size: M5x0.8, M6x1.0, M8x1.25, M10x1.5, M12x1.75 Fitment: Effectively restore stripped, damaged, or worn threads on a variety of materials, including aluminum, iron, carbon steel, bronze, magnesium, and more Package List： 5 x Tap 5 x Installation Tool 5 x Breaking Tool 5 x Drill Bit 5 x Pack Of Threaded Insert 1 x Hex Wrench 1 x Toolbox 1 x Instruction Manual