301Pcs Helicoil Thread Repair Kit, Metric & SAE Rethreading Tool | Multi-Size Kit with HSS Drill Bits Inserts Taps Break Off Tools for Automotive Engine, Spark Plug, Stud Bolt Repair

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About This [ALL-IN-ONE COMPLETE REPAIR SET]: This thread repair kit comes with thread inserts, installation tools, twist drills, breaking pin tools, screw taps and hex key. Compati ble with both SAE and metric sizes including 1/4", 5/16", 3/8", 7/16", 1/2", M5, M6, M8, M10 and M12, widely meeting various thread repair needs [HIGH QUALITY MATERIALS]: All core tools are manufactured from high quality alloy steel with heat treatment process. Boasts great hardness and wear resistance to deliver reliable long-lasting performance under tough working conditions [PRECISE & HIGH-EFFICIENCY CUTTING DESIGN]: Twist drills adopt 135° top angle for accurate self-centering drilling. Flute grooves on drills and taps effectively remove metal chips, prevent clogging and achieve smooth, clean threading operation [VERSATILE & EASY TO OPERATE]: Great for restoring stripped & damaged internal threads, and conducting routine thread maintenance to avoid abrasion. Simple operation workflow fits professional mechanics as well as DIY hobbyists without complex learning [ORGANIZED PORTABLE STORAGE CASE]: Custom molded lock slots secure each tool to prevent falling during use. Clear size markings on slots enable quick identification. Hard shell carrying case supports tidy storage and convenient outdoor transpor Show more