Big Horn 19109 24" Center Finder Rule. Accurately locate the exact center between any two points. Graduated in 1/32" on top and 1/16" on bottom.
Zero-point in center of rule with increments to left and right. Allows quick location of center between any two points. Especially useful in picture matting, forms creation and for locating button holes and pleats in pattern making. Faster than using dividers and eliminates guesswork. Bottom edge is a standard rule.