Helix Conversion Ruler
Helix HLX37420 – Conversion Ruler offers a convenient way to measure either Imperial or metric and then get instant conversion to either. In addition to Imperial and metric measurements on the edge, the unique design incorporates a conversion scale in the center so you can convert measurements from metric to inch and inch to metric. The background is black so the white imprints of 1/16″ and millimeter graduations are easy to read. Ruler is printed on both sides and made of flexible plastic..