INSIZE Electronic Back Jaw Centerline Calipers This unique gage allows you to measure centerline distances in the same or offset planes. Features include... 1.2" - 40" / 30.5 - 1000mm Measuring Range 0.0005" / 0.01mm Resolution + 0.0047" 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: 1.220" D: 1.2" L: 48.898" L1: 1.535" L2: 2.756"