MITUTOYO 500-195-30 0-4" MyCAL Absolute Digimatic Caliper Hardened stainless steel construction for protection of caliper components Four-way measurement capability for multiple applications: outside diameter (OD), inside diameter (ID), depth, and step Digital, single-value readout LCD display in metric units for readability Position memory for retaining measurements Function control buttons on the face, for ease of use: Origin, On/Off, and Zero/ABS (Absolute Scale)