Mitutoyo Type A Blade Micrometer w/SPC Output The anvil and the spindle have a blade for measuring the groove diameter of shafts, keyways, and other hard-to-reach portions. Specifications include... 0-1" / 0-25mm Measuring Range 0.00005" / 0.001mm Resolution + .00015" Accuracy Features include... Ratchet Stop for constant force SPC Output Supplied in fitted case Blade Dimensions... see drawing...