Staples 15" Data Processing Magnifying Plastic Ruler (51903)

Staples magnifying rulers are designed for use with computer printouts and data tables. The center section magnifies and isolate one line at a time. One edge of the ruler is includes an Imperial scale with 1/8", 1/16" and 1/8" increments, and the other edge is scaled in centimeters. The magnified portion outlines with two blue bars for ease of use and is ruled by number of lines on one side and centimeters on the other. Two other scales along the center section correlate with horizontal and vertical printout columns. Numerals and graduations are sharply delineated.