Negative Positive
Title: Sometimes It Might Give the Right Length...
Review: ... but usually it just produces random numbers, measurements that are impossible (22 inches?!). Apparently the makers are aware of this habit, as the instructions said to wipe the shaft to dry it otherwise you get crazy results... but this unit was not wet. It started doing that right out of the box (as soon as I replaced the battery, because of course the one already installed was dead... so much for the "spare" battery.) Later it started occasionally giving "right" answers (at least the numbers looked reasonable and when I opened it and closed it it returned to zero) but then it reverted to crazy answers. A piece of junk.
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