Very large calipers in the 6 inch version have a data connector on top. I was hoping this brand would have a data cable at a similarly affordable price. They don't. No deal breaker. Although I like that very big screen. I would like it on the 75mm set and the 50mm bag caliper set. Suitable data cables or RS-232 are currently available for this. Prices here on Revain are around $40. Again, this didn't break the deal, just hoping for a discounted cable for them. Are they the most accurate in the world? So far they seem to be pretty accurate. You are not certified or do not have a certificate with you. But for what I do, absolute measurements are not critical. And two, reflecting what one of the other reviewers called a gadget, there's a gap at the top of the calipers for internal measurements. Again, compared to the 3 or 4 other kits I have, I don't consider this to be a critical issue. It would be interesting to have a set with a backlit screen or even a reverse contrast screen for easier viewing in all lighting conditions.
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