Cheapest calipers often have wobbly jaws that makes the stated DRO precision of it meaningless. A quick check is to close them, reset the display and do a few f

Cheapest calipers often have wobbly jaws that makes the stated DRO precision of it meaningless. A quick check is to close them, reset the display and do a few full scale motions. You'll often see the zero is not maintained.