Depends on how accurate you want to be. The cheaper chinese stuff is a bit less accurate than the Mitotoyo in the same way that a that a Toyota Hilux is a bit nicer than a Great Wall. Still does what it is asked but the Toyota does it that much better. I use a cheap set for measuring seating depth (among other things) and it is good enough for what I do, but for my brother inlaw and his engineering based job (Lathes & Mills etc) they wont cut it. His sets are all Mitotoyo, or Moore and Wright etc.
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