HOYLE ACU-ARC ADJUSTABLE RULE - FRACTIONAL

The spring tensioned bar of this 12" "bend-able" rule can be easily adjusted to draw curves of any radius - from 6-3/4" up to a staggering 200". The sliding adjustment knob locks and holds settings.

Determine the radius of existing curves for dimensioning drawings; find center lines and center points of curves; and determine at what radius a curve must be "fair" at a particular point or line on a drawing.

A corresponding metric version (#50000) is also available. Both the fractional and metric rule are the same size. USA