Use this 45-degree Kaleidoscope ruler to cut designs created with eight separate 45 degree triangle units such as Kaleidoscopes and Dresden Plate blocks. These triangles can also be pieced into a saw tooth border. 

Cut triangles to a finished height of 8 inches to piece blocks that measure up to a finished size of 16 inches. A 1/4 inch dashed line is printed on each side of the centre vertical line so you can cut 22-1/2 degree triangles that include the seam allowance.