Designed by Sheila Christensen for Creative Grids is the Half Sixty Triangle Ruler. This handy tool allows you to cut diamonds, triangles, trapezoids, and more. It features 30 °, 60 °, and 90 ° corners, as well as markings every 1/4" and a 1/4" dashed seam allowance along the edges. The back of the Half Sixty Triangle Ruler features Creative Grids exclusive gripper technology that prevents your ruler from sliding while you are cutting. Use the included instructions or scan the QR code to view a video demonstration. Made in the USA.