0.05mm Resolution Dial Calipers

Accurate measuring tools are essential for successful 3D printing of anything that mates with anything else. While these calipers aren't as accurate as the real McCoy, they are handy when your Mitutoyo's are hiding elsewhere. They have both external and internal measuring jaws for versatility.The main reading is taken off of the scale on the body (in 2mm increments), and to that, you add a secondary reading from the screw dial (0 - 2mm in 0.05mm increments). Realistically, it's probably only accurate to about 0.1mm, but that's still way better than a ruler.The measuring jaw is moved by rotating the dial/nut. The secondary reading is where the fiducial line on the movable slider lines up with the marks on the dial. But because the threads have some backlash, you need separate fiducial lines for external (screwing in) vs. internal (screwing out) measurements. To set the external fiducial line, screw the calipers all the way shut so that the jaws are touching (snug but not tight). The 0.0