Used one all the time at a tire shop I worked at while in high school. It was a shared torque wrench like Brokeguy had stated, so it got alot of use. But never failed in any way and always seemed to be a little better built than some of the cdi's the auto techs had. Plus i love the roller on the side for setting desired torque. I was working on a utility trailer and somehow left it lay on the trailer floor when the guy took off. Thought we lost it for good and my boss was pissed. On my drive home, i spotted something red and shiny on the side of the road, and sure enough there it was lol!!!!!!!!!!!!! a few scratches on it and the socket was gone but i brought it back the next day and put it back to work. preformed flawlessly after falling off a trailer at 50 mph.