i'm not saying you can't get lucky, as yours clearly seems fine. i'm saying this based on having bought about a dozen of these for my guys, and i have about 2-3 that held size for more than 3 months. the other ones that still work are used for very VERY rough measurements or for the saw only (+/- .01"). so out of 12, i have maybe 3 still working reasonably well. just my personal experience.