I've never really liked helicoils as I've come across several that have failed - perhaps they were just not installed correctly. I prefer time-serts or ez-lok
Sometimes there is no option, I want to use them on the underside of my truck, can't exactly turn it upside down and put it on a pillar drill.installed properly they are stronger than the original thread.....
it's just the morons try to do it with a hand held drill standing on a ladder.......hahaha......
like life it's all just a compri.......
Just lift the truck up and bolt the drill to the bottom of the truck simple!Sometimes there is no option, I want to use them on the underside of my truck, can't exactly turn it upside down and put it on a pillar drill.
Of course they won't work if you can't hold a hand drill steady...
I Araldite them in if it's a very short coil like when I repair magnesium kart rims with stripped bead retainers that have only 5 or 6 threads.
Just lift the truck up and bolt the drill to the bottom of the truck simple!
I have a set but can't remember the brand? I had a google but cant find it but I did find this which looks useful
https://www.recoilshop.net/index.php