In my misspent youth, I spent a few months installing overhead doors. We were on one job, in a lumber storage building at the Masonite operation up in Ukiah (north of San Francisco), at the same time as the sprinkler installers. They were using conventional pipe wrenches the same length. Two guys, one of whom would stand on one wrench to hold it in place while the other did the grunting. Every hour or so, they'd trade jobs. I was dripping sweat; they weren't. I was making a little more than minimum wage; they were making just a tad bitty more.