Metric Helicoil Thread Repair Kit: 131-Piece Heli Coil HSS Drills Inserts Taps & Tools M5 M6 M8 M10 M12 Automotive Engine Spark Plug Cylinder Insertion Rethreading Tools Universal Rethread Restorer

Firstly, this comes in a metal case, which is very welcome.I’ve used this a few times now and had no problems. The drills have worked absolutely fine, the taps too. No problem fitting the inserts though the tang at the bottom doesn’t always break off when it should, though it’s not caused a problem.So far it has made repairing damaged threads a breeze, the installed inserts have worked great. Last repair was a coolant pipe retaining bolt on an engine. It was quick, easy, the bolt went in first time after the repair was made and no leaks.Highly recommended!

This fixed a thread issue on my vehicle. Was worried I would have to create new threads, but this kit was a life saver. Use lots of cutting oil and go slow for the magic to work.

This is a great kit that has pulled me thru some tough repairs on internal threads!There are way more inserts than I will ever use but it’s great knowing I am covered in the instance that I might need one for an emergency!I repaired a few threads in my motorcycle subframe that seem to always be a problem when threading in steel bolts into an aluminum frame! Worked great and saved me from a trip to the dealership for a more expensive repair. I have also used them to install handles on my tractor and made a cue ball shift knob for my car with the inserts. For anyone curious, pool balls need helical insert or the bolts will shatter the threads!Kit comes with the appropriately sized drill bit, helicoil specific Tap (this is not a regular thread sized tap), helicoil Installation tool, and helicoils in several sizes.I Highly suggest this kit to any mechanic or DIY person because sooner or later you will need it!

To be fair, what I received looked like the main picture. I found 5 (one of each size) of bits, taps, insertion tools, and breaker pins (20 items), and 110 repair coils, 25x(M5,M6,M8,M10) and 10xM12. The front of the box indicates the remaining item should be one hex wrench. Presumably, this means some sort of tap wrench to hold the tap while it's driven into the recently-drilled hole.Overall, it's a good set for the price. Just be aware you'll probably want a tap wrench--or two, since there don't seem to be many that can secure all five sizes. You do want something that will help keep the tap square to the surface while you're cutting new threads. Hopefully the seller rectifies the issue, or at least changes the description. I see that the SAE set also seems to lack a tap wrench, but at least the box doesn't list that you should be getting one.

I would recommend this product. I bought 2, this being the better one. Used it on a 799 ls exhaust stud that was broke off inside & it had a broken hardened milwaukee bit inside. Sadly I couldn't keep the same stock size exhaust bolt. Had to go 1 size bigger but that Chinese drill bit ATE thru everything & whole process took 5min. So in the end a junkyard run would be 70 plus gas & new head to much $. But now I have a kit & new skill unlocked.

Works ok. The drill bit need to be tapped so they can fit in a modern drill. The sharpness and it's ability to hold an edge are questionable. But still got it done with a few bits from DeWalt and Irwin.

got what i ordered works intended

Great for that stripped thread that you didn't expect. Metric or standard they have both sold separately of course.