INSIZE Digital Indicator with 4" Measuring Range Specifications include... 0-4" / 100mm Measuring Range 0.0005" / 0.01mm Resolution +0.0015" Accuracy Features include... 3/8" Diameter Stem Lug Back Data Output Button Functions include... on/off, zero set, in/mm, data preset, tolerance, change measuring direction, MIN / MAX / TIR, ABS/INC