BILITOOLS M12x1.25 Thread Repair Kit, HSS Drill Helicoil Repair Kit Metric — Open-Box, 40% Off

Used for repairing damaged or stripped internal threads and creating a stronger internal thread.

Suitable for all metals, composites, polymers and other materials. Our thread repair kit can be widely used in automotive and plumbing applications.

304 Stainless thread inserts create longer lasting durable threads, increase the possibility of higher torque application in weaker metals. 135° apex angle of twist drills, with stronger metal penetration and higher efficiency

Thread repair kit includes a collection of tools including HSS drill, tap, thread inserts, installation tool, break pin tool.

All the parts are organized in a convenient iron case for easy transport and storage between jobs.

Attention: Before you buy this kit, please make sure which size do you need. If you don't know, Please see the picture 6.

Designed for durable and professional repairs, this complete HSS helicoil kit restores damaged or stripped M12×1.25 metric threads using corrosion‑resistant 304 stainless steel inserts that create stronger, longer‑lasting threads than the original material. Suitable for use on metals, composites, and polymers, the kit includes a high‑speed steel drill with a 135° split‑point tip for fast and accurate drilling, a matching metric tap, stainless thread inserts, a dedicated installation mandrel, and a break‑off tool—everything you need for a complete threaded‑insert repair in one organized set. The 304 stainless inserts enhance load capacity and corrosion resistance, allowing for higher torque application in softer or weaker materials such as aluminum engine blocks, transmission housings, and fluid‑system fittings. Whether you’re repairing automotive components, industrial machinery, or plumbing assemblies, this kit delivers a reliable and factory‑ready threaded solution that withstands repeated use and demanding environments.