Alvin Double Readout Plan Measure

The Alvin Double Readout Plan Measure precisely measures blueprints, maps, and drawings. It has two large color-coded faces or dials, each performing a specific function. The white dial accurately measures distances on maps and plans in inches and centimeters. It can also be used to chart travel routes or determine distances between items on a plan. The other dial is yellow and measures blueprints and drawings using the most common fractional scales from 1/16 inch up to one foot.