Helicoil 263-piece metric and sae thread repair kit. A total of 263 pieces including drill bits, screw taps, wire thread inserts, installation and tang break-off tools, and two thread gauges for easy size verification. Made to professional standards. Sizes included: sae 1/4", 5/16", 3/8", 7/16", 1/2"; metric M5, M6, M8, M10, M12. High quality steel with a titanium coating for maximum durability. Heat treated for superior hardness and impact resistance, delivering long lasting performance and extended lifecycle. Versatile and compatible with a wide range of materials, including aluminum, iron, carbon steel, bronze and magnesium. Ideal for automotive and plumbing applications. Easy to use: a 135° drill bit and a break-off tool enable professional-grade thread repair. The kit supports drilling, tapping, inserting coils, and breaking off tangs. The insertion tool features a rubber-coated handle for a comfortable, reliable grip and also serves as preventive maintenance to protect thread integrity. Use scenarios: - Repair stripped or damaged threads in automotive components made from aluminum or iron. - Restore damaged threads in plumbing fittings and other metal parts. - General thread repair in machinery and equipment to prevent wear and preserve integrity.