BILITOOLS M8x1.25 Thread Repair Kit, HSS Drill Helicoil Repair Kit Metric

Why did you pick this product vs others?:Really nice repair kit!! Never had an issue with these helicoil's... Well worth the money

I was very close to just buying the Helicoil kit which is like $60+ but I am very glad that I made the decision to give this kit a try.My Subaru’s high performance Brembo brake caliper mounting bolt thread had stripped out (common for STi Brembo calipers- due to the bolts being the harder metal: steel & calipers being aluminum- which is a softer metal) and this kit has given me a brand new caliper thread for bolting the caliper to the mounting bracket.10/10 would highly recommend!It comes with instructions, but watch a few installation videos so that everything is fresh in your mind.Advice I would say is take your time, work very carefully and make sure that you drill perfectly straight into the stripped thread, backing the drill out occasionally to get metal shavings out of the hole. When the time comes to use the thread-making tool, also make sure it is going in nice and straight, go slowly while creating the new thread which the coil will sit into. Then inspect the new threads, make sure they are clean- blow out any metal shavings/debris. Next, load your new threaded coil into the installation tool, by hand turn the installation tool & you’ll feel the coil catch sit into the newly made thread. Once the coil is fully seated into the hole, visually inspect it that all the threads are even and straight. Use the included breaking pin tool to break off the little coil end tang. Finally, thread the bolt intended for the previously stripped-out hole into the newly coiled, repaired threaded hole.

Must have, I used this on my aluminum block in my car and it worked really well.The box is nice and sturdy so it can be stored easy.Will hold or exceed bolt strength..Super fast and easy repair.Repaired my next door neighbors lawn mower by threading on of these in wood… it’s a funny repair but it worked perfectly

I have used a lot different thread inserts in my career. This kit is better made then kits at your local auto parts store. Worked great fixing a mistake that I made.

Was a hard-to-find size for me at most stores. Looks good and, seems solid

BILITOOLS M8x1.25 Thread Repair KitThis saved my butt on a stripped hole. Everything worked flawlessly and the quality of the tools was impressive for the price. Inserts threaded clean and tight. Must-have for any shop.

Awesome!! Easy to use and got the job done. Great price too!

i'm almost finished making a custom router table insert from a 3/8" thick aluminum plate. I have what I thought were the hard parts done: mounting bolt holes, the center bit hole and rabbet to hold some plexiglass zero clearance rings, etc. I planned to tap 8 holes for the starter pin locations -- four centered on the outside edge of all four sides about 3/4" from the edge, and four more in line with those 4, but 3/4" from the bit opening at the center of the plate.After breaking 3 of the 8 taps that came in a set from this site, I sent them back for a refund and bought a single-size drill bit and tap set for much less. That tapped the 4 outside edge holes perfectly.Unfortunately, 2 of the inside holes were slightly too big, because 2 broken taps had to be extracted with a punch and hammer. The final 1/4x20 tap was able to complete those 2, but they wound up looser than they should be The 3rd that broke was the 1/4x20 tap, and it remained in the plate. I was unable to pound it loose. My efforts to remove it also caused some minor damage around the hole.I ordered some diamond hole saw "bits" from this site, and managed to remove enough material around the stuck tap to punch it out. Whew!!Oh, the 4th inside hole was tapped okay except it was not perpendicular. The starter pin was at an angle when screwed in. Four out of four holes were messed up to varying degrees.I've never used the helicoil or any other thread repair product, but the reviews looked promising, and the process appeared simple enough.This helicoil kit arrived today, and I proceeded to repair all 4 holes. I first drilled them all while I had the drill bit from this lit in the drill press. I then tapped the holes using the drill press but turning the spindle by hand to hopefully keep the tap perpendicular to the plate.Between tapping each hole, I used a drill-driver on low speed to extract the tap from the plate, then cleaned and installed it into the press again. I used compressed air to clear out the newly tapped hole, and I followed the instructions to insert the helicoil and break off the pin.Installation succeeded without any problems. The helicoil inserts are almost exactly the same depth as the plate, so that's convenient.Now i have four freshly repaired, threaded holes around the bit opening. There's a very small damaged spot next to the one hole I had trouble extracting the 3rd broken tap from. I may try filling it in with the aluminum braising rods i just got for a different repair, but not right away. It's 99% cosmetic as far as i can tell. The starter pin screw works fine in it and sits perfectly perpendicular. That's what matters most.BTW, I was comfortable with the design of this product, because in woodworking, I use a lot of threaded barrel inserts for jigs and such. The Helicoil is basically a metalworking version of that wood-working fastener.i don't often need to repair stripped threads inside a bolt hole. However, the next time i do, i'll know what to use.