I think you can do alright with this sort of middle-low range type of thing if you’re not in critical need of very close tolerances. The $10 ones are just garbage, and will lead to tears in short order. I question whether anyone willing to put up with iffy devices that purport to scale to the .0001 in. really needs something like this. A compass or plain calipers that you then measure with a ruler is probably the ticket for ‘close enough’ applications, and then you don’t have to mess with batteries and another cheaptastic tool taking up space in your toolbox.
