Electronic Internal Caliper Gage This type of gage is perfect for measuring bores, internal grooves, and other hard to reach inside dimensions. Specifications include... 0.20" - 1.00" / 5-25mm Measuring Range 0.0002" / 0.005mm Resolution + 0.0012" Accuracy 1.378" Tip Arm Length 0.059" Tip Height 0.039" Tip Width .012" Radius Ball Contact Points 2.362" Diameter Display Features include... Display rotates 170° Functions include... Go / No Go Display, Data Preset, Min / Max, Abs / Incremental Data Output Furnished in fitted case