N Looks good but needs some work to make it usable. The sliding caliper is very roughly machined, as is the channel through which it slides. You need to grind and polish it carefully so that it can be opened and closed with two hands. After doing this everything seems to be working fine, although you have to be careful not to over do what the manufacturer should do. Compared to a good caliper, measurements seem just as useful if you're willing to put in a little work.
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