Stainless steel frame caliper has easy-to-read dial. Accurately measures four ways: outside, inside, depth and steps. Lets you measure precisely to .002in. accuracy. Tolerance is ±0.001in. (0-4in.), ±0.0012 (4-6in.). Thumb roller and position set screw. Shockproof. Lifetime limited warranty.Display Type:Dial.Length:6 in.Material:Stainless steel Application:Inside, outside, depth and step