Instruct: Classify the given Amazon review as either positive or negative.
Query: Not at all precise

My father had picked up a couple of these calipers thinking they were a good deal. I checked one using a 1" micrometer standard. I found the calipers were both off. One was off by .021 (21 thousandths) and the other was off by .007 (7 thousandths) when measuring an exact inch. I did not have a two inch standard available, but it stands to reason that at 2 inches they could be off by as much as 42 and 14 thousandths respectively. These inexpensive calipers might be suitable for rough work but I would not count on them for fine machining, ammunition reloading, or any job where precise and accurate measurements are critical.