Finally a tool for dealing with pieced rectangles that is easy to use and accurate. The Split Rects ruler gives you all you need to make perfect units every time: charts for the starting strips, guide lines for cutting the elongated triangles, an angled edge for easy cutting, and a trim down section that enables each pieced unit to be quickly and exactly trimmed to the desired size with perfect placement of the angled seam. Here is a link to a video, just scroll down to the bottom: https://deb-tuckers-studio-180-design.myshopify.com/products/split-rects