ABSOLUTE Digimatic Caliper 0-200mm / 0-8" Mitutoyo 500-172-20 Features: Large and clear LCD readout. The ZERO/ABS key allows the display to be Zero-Set at any slider position along the scale for comparison measurements. This switch will also allow return to the absolute (ABS) mode and display of the true position from the origin (usually jawsclosed point). Data Hold Unit is optional. Carbide-tipped jaw type calipers are also available.