Digital Radius Gage Set Measure radius of external arcs, arc angles of measured surface should be larger than 90°. Instantly displays radius value, eliminates the need to perform a calculation. Features include... 0.079"-1" / 2-25mm Measuring Range 0.0005" / 0.01mm Resolution + 0.002" Accuracy Data Output Capable Includes Pin Gage for zero setting Buttons include... on/off, inch/mm, zero, data preset