Heli-Coil, I've installed thousands of them in everything from engines to transmissions and they are a fast, easy and permanent fix. They are actually built ever so slightly over sized so that they are drawn in or shrunk as you install them, once you get them in and release tension they expand and grip the threads you tap for them, which locks them into the hole. I wish I had been the guy who invented them...
Last edited by brushcutter; 04-30-2013 at 05:11 PM.
DESTRUCTION is just a couple of vowels down the street from DISTRACTION