Thread Repair Tool, File, Chase, Restore, Repair, and Clean Internal and External Thread: Male, Female, Inch, Metric and Pipe Thread (RT1) (3/8 Dia. Head x 2 Length x 1/8 Arbor) by Rotary Thread

I purchased this tool after watching a review of a similar product on YouTube. This one is very similar if not the exact product. Works great with a high rpm impact drill. Also it does take a little getting use to at first, my suggestion is lock down whatever your working on and use two hands to control the direction of the drill as well as the recoil of the spinning bit. Also go with the direction of the drill while using. LIFE SAVER!!!

Although I was shocked by how small it is - it saved a damaged 3/4 threaded rod I had already welded to a bracket. I used a Dremel and magnification and was able within a few minutes to get the nut to travel the full length of the rod. ONE LIMITATION is this works best where you can get the tool perpendicular to the threads being repaired. Even using a Dremel extension I had to work at a slight angle 6 from the end of the rod which wasnt a problem due to the large threads I was fixing but it could be an issue on finer threads.

If you have to repair threads, this is the tool you need, my only suggestion is order the larger one, also do not add pressure to the tool lay it in the damaged threads lightly run along threads,

This thing is great, only used twice for one application, so cant speak for longevity. The shank is stepped to go in both a drill or a rotary tool which is handy. The finishing cut is great for what it is, this is poor/lazy mans tap and die set. Works amazingly on make threads. Little difficult on female threads but only because they are more difficult to reach. If it takes a year to wear out Im coming running back to buy another.

Its very rare these days that things actually work, and this thing worked. Saved me $985!. We have a firetruck and one of the hose reels threads had corroded to the point of no return. The replacement cost was extremely expensive as the thread is attached to one piece and can not be replaced. I gave this thing a try as a hail-mary and it actually worked. Half of the threads were on the backside that I couldnt see so I just followed the front threads and prayed that i wouldnt jump over a thread. Followed it all the way back around and kept going. Used a little Brakleen to clean off the grit and the coupler fit right on first time around. I still cant believe it.

Works great! Was really easy to use in my dremel.

While I didnt use this exact thread repair item (I found one at the local auto parts store before this one got here) I filed both internal and external threads. The one I got at the auto parts store is the same as the one I ordered from Amazon. (kept both of them) These were 22mm left hand wheel studs and nuts, didnt know this was possible. Worked like a charm!

I bought this to clean up the threads on a part where the threads were distorted by welding. This tool cleaned them up nicely in a matter of minutes. I also used it to clean up the rusty threads on our main drain clean-out fitting which was pretty messed up after nearly fifty years. Fifteen minutes later the threads on the drain and cap were cleaned up and the cap securely screwed on. I would suggest when working on heavily damaged threads that you stop occasionally to flush the rust or metal particles out of the threads. And no matter what, flush them out when you are done.

Im not sure this product really repaired the threads. I had some threads on an M12x1.0 that were smashed in a small area that made it difficult to thread a nut. This tool is just a grinder and you need to be cautious about grinding too much. While it worked in that I could thread the nut on it was mostly due to the fact that this basically removed the threads in the spot entirely. If you arent careful you could potentially cross cut the threads. I think this may work better on larger thread pitches like 1.25+ but on fine threads like 1.0 its more difficult. The product worked but for the money a die or chaser still works better.

Ruined the threads on a crankshaft and this fixed them