Rapid Rules are an ingeniously simple improvement over the flat and triangle scales. It's unique shape instantly identifies the scale edge. Simply rotate the scale rod to locate the needed scale. Once located, it is retained...ready-to-use, every time you pick it up. All six scales read from left-to-right and read only one scale at a time.

Rapid Rules are made in the U.S.A. to a professional grade with smooth, crisp and clean edges. "It feels like a quality instrument." - J.K. Fine Homebuilding

Impressive on any desk.           Simply the best and easiest scale to use.