Vernier calipers are repeated 9 times out of 10, almost a thousandth, but I still think this should be repeated more often. Unlike Mitutoyo calipers, they aren't as smooth as I would expect. When I ride her full length I can feel her stutter but not too much. They can get the job done, but they're not the highest quality I've seen. To be honest I would recommend ordering precision tools. as it is from providers like Granger. I trust them more than Amazon.