Review on INSIZE 6313 0D7 Setting Ring Diameter by Ethan Delaney

Bought to check the accuracy of measuring the inside diameter of vernier calipers and other measuring tools. Supplied with a certificate of accuracy and measured diameter information up to 1/100,000 inch including bore taper and runout measurements. Both the meter and the metrological certification report have a serial number. My diameter is nominally 0.69997" and my new Mitutoyo IP67 6" caliper rounds it up to 0.7000". Just a few days ago mine was listed at about 1/3 the current price. I'm not sure , why it is on sale, or maybe a list of errors, but I got it A necessary element for checking the accuracy of measuring instruments used by locksmiths and other people who work with small dimensions.