Acu-Arc adjustable curve rulers eliminate the need for a beam compass or expensive curve sets. The Acu-Arc curve can be adjusted to any radius, from 6-3/8" to 200" (17cm to 500cm), to determine the radius of an existing curve for dimension drawings, to find center lines and center points, or determine what a curve must be to fair in existing points, or lines, on a drawing.
Still manufactured by hand, Acu-Arc rulers and curves have been used by architects, engineers, chiropractors, designers, draftsmen, artists, woodworkers, metalworkers, surveyors, carpet installers, and law enforcement for over 50 years. Two models available: marked in inches or centimeters. Acu-Arc adjustable rulers are made in the USA.