Originally Posted by gbaglo
I think the pertinent question to ask is, how long will this tool be accurate?
True. However, mine had been used lots (I change winter/summer rims for two vehicles every year) before I tested it prior to the engine rebuild, and it was still dead accurate.
The click mechanisms used in these wrenches is actually very simple, and barring failure or fatigue of the spring, I doubt that significant deterioration will be an issue for most personal users. If they start out accurate, my experience suggests that they will likely stay that way. In any case, if slight changes occur, calibration will sort them.