Simple Folded Corners Ruler - Use with any pattern calling for folded corners. Remarkably accurate! Never draw a line for a folded corners again! The ruler has convenient lines for precise measuring and provides the ability to cut folded corners with two methods. Exact size folded corners with no trim needed OR oversize folded corners that are trimmed down. Easy to read, no matter what shape you are adding a folded corner to (square, rectangular, triangle). Step by step instructions included with the tool. Illustrations for both left and right-hand trimming. Plus a bonus - free project pattern.