Now I chose the vernier scale cuz (1) there's no iffy electronics or batteries to deal with and (2) there's no dial with gears that can jump the needle cuz of any small particle slipping its way inside the rack, which does indeed happens a lot. This caliper is dead accurate on all four of its measuring functions, that being the outside measurement, inside, depth rod, and the step measurement. I did a thorough inspection with my gauge blocks and parallels. So worth every penny. Now let's face it,See full review