Readout switches between inches and metric measurements with a push of the Inch/Metric button. Supplied in fitted plastic case. Hardened stainless steel construction with 4 way measurement: outer diameter, inner diameter, depth, and step. The Zero/ABS button allows for the display of the absolute coordinate or true position from the origin point. Where To Use: Perfect electronic vernier gauge for any small size measurement. It is the ideal measurement tool for a wide range of industrial, hobbyist and electrical applications.