INSIZE Electronic Arc Radius Caliper This Electronic Arc Radius Caliper is perfect for measuring the radius of an arc that is less than half round. Features include... 0.2-6" / 5-150mm Measuring Range 0.0005" / 0.01mm Resolution + 0.0020" Accuracy 10.354 Gage Length (L) 2.559" Jaw Height (d) SPC Output Stainless Steel construction