INCRA Bend Rules make dual-surface layouts a snap using the corner slots shown above. The INCRA Bend Rule is precisely what you need for layout and measurement along the edge of a board or other workpiece. Weve put micro-fine marking holes at every scale line to instantly locate your sharp pencil point or scribe exactly on target with zero undertainty and no eye strain! The 90 shape holds it snugly in place while the two scale surfaces let you mark and measure on the top, edge and corners simultaneously! There are even two vertical end scales for drawing precision parallel lines relative to the edge of your work. All three lengths of bend rules are also available in INCRA Rule Sets. The Bend Rule draws perfect horizontal lines using the end marking holes while sliding the rule along the edge of your work!