INSIZE Electronic Back Jaw Centerline Calipers This unique gage allows you to measure centerline distances in the same or offset planes. Features include... 0.8" - 20" / 20.5 - 500mm Measuring Range 0.0005" / 0.01mm Resolution + 0.0039" Accuracy Buttons: zero, power on/off, in/mm, preset Data Output Hardened stainless steel Includes plastic box FREE SHIPPING UPS GROUND (CONTINENTAL US ONLY) Drawing Dimensions... C: 0.945" D: 0.8" L: 27.244" L1: 1.024" L2: 2.756"