Alvin and Fairgate aluminum centering rulers are ideal measuring aides for dividing and gauging layout, printing, spacing, lettering, and more. Also useful in picture matting, form creations, and locating button holes and pleats in pattern-making. Calibrated 2 edges; one side, bottom edge standard ruler straightedge graduated in 32nds and 16ths. 1.75" wide.
To find the center of any two- or three-dimensional object, place the ruler on the object so that the same measurement appears to both left and right of the "0" mark. The arrow on the rule now points to the exact center. These aluminum center finding rulers are available in several popular lengths.