Rocaris 30 Pcs Thread Repair Kit, M6 x 1mm Thread Repair Insert Kit Compatible Hand Tool Set for Auto Repairing

This kit helped me fix threads in a mountain bike frame with ease. This same kit was almost twice the cost at my local auto part store. It shipped quick, and in good condition. There was no packaging (not a big deal to me) and everything was in a zip lock bag which was nice and secure. Decent measure to take on saving money for the end customer. I dig it. :)

Wasn't sure what to do when I stripped the threads on a mounting bracket on the engine of my truck while changing coil packs. Did some research and ran across this 'helicoil' technology. I needed a pretty small on (M5), and none of the local auto parts stores carried any that small. Found this set on Prime-Same Day delivery, and ordered it. It arrived as shown....no instructions whatsoever. Having watched a couple of YouTube videos on using helicoils for thread repair, it was pretty self explanatory. The kit comes with the coils, a drill bit, a tapping drill bit, a punch and the insertion tool. Instructions would be: 1. Drill out the existing hole using the 'plain' drill bit. 2. Tap the hole with the tapping bit to create some threads for the helicoil. A little cutting oil helps here (a drop or two). 3. Blow or vacuum out any of the metal shavings from Steps 1 & 2. 4. Place a coil on the end of the insertion tool, with the tang of the coil in the bottom slot on the tool. If you are working in a tight spot, or in a downward position, put a dab of grease on the tool. The stickiness will hold the coil on the tool. 5. Screw the coil into the prepared hole. There is a set screw and collar on the tool you can use to set the insertion depth of the coil, if needed. 6. Once at the desired depth (typically a turn or two below the lip of the hole), remove the tool, and insert the punch. 7. Tap the punch with a hammer (gently) and break off the tang. Blow or vacuum the tang out if needed. 8. Install your bolt as designed. All in, this took me about 10 minutes, and the bolt threaded in perfectly and locked in tight.

I have used several now. The only issues to date are as follows: On an oil pan, I did not seat the threads deeply enough and the threads leaked. I had to drill a couple of them out and replace. On the second run, I used thread locker, took the inserts deeper so they did not partially extend below the engine block and also used a gasket sealing compound on the screws and around the pan. It is working well-no drips to date. The only other issue is be careful when seating the threads. As you are nearing the bottom, make sure you can withdraw the tool. It could be due to me not tapping deeply enough but the insert constricts as it gets deeper. This prevents the insertion tool (screws the insert in place) from being removed. You can't unscrew the thread without breaking the ears at the end or pull it our. In my case, I broke the ears off. Lesson learned....

stripped a thread on an aluminum manifold - dang!!! This saved the day at a much lower cost than other brands. The kit includes a bunch (didn't count but looked like about 20) whereas more expensive kits I've bought only included one. Maybe not the best quality steel but plenty good enough

Worked great, not easy to remove broken bolt in aluminum block

Nice item, nice price

This set is just OK. I used them to repair the rocker arm bolts on my mower engine(kohler command). The tap and drill were great, I had zero problems using them in aluminum. The helicoil install tool is very cheaply made. It would bend slightly as I screwed in the helicoils and become stuck in the hole. The helicoils themselves were crimped in the wrong spot(just slightly off) so the tabs didn’t break off cleanly. I strongly recommend only screwing in the helicoils until they are just below the surface, that way you can remove them if the tab doesn’t break off right. Just pry up the top coil and pull them out to remove. Once the helicoils were installed, it’s hard to get your bolt screwed in because the top of the helicoil has sharp edges. At the end of the day these did work for me, but they were more trouble than name brand. If you’re determined to save money, just know that you’re making a gamble here.

Great price and the product worked wonderfully well on a pair of stripped out transmission pan holes. No more leaks. I’d buy again.

Saved my engine casting. Coils Worked great. The install tool was not so great. Modified it to match the shape of a brand name tool

Overall, la broca y el machuelo funcionan muy bien, el problema viene cuando se inserta la cuerta y hay que romperla. En lugar de romperse estira la cuerda en el inserto.

Good product. Got me out of a jam while working on a stripped thread.

The only problem is the inserting tool, which is not hardened, so you need to file down the tip of the tool to remove it from the inserted helicoil.

Excellent and complete set