We have all done it, overtightened a bolt and blown out the threads. When a bolt starts to tighten up and then go suddenly loose, you know that the threads are toast and now you have a problem.

A bloody hand streaks through the air, discharging the offending 1/2-inch-drive ratchet into an excursion through the garage wall. The only thing more piercing than the pain is the howl of agony that ...