90 Degree RulerUse the straight side of this double strip ruler to cut 1-1/2 and 2-1/2 inch strips or use the pre-cuts that are on the market. Easy to UseThis is a double bar ruler perfect for designers, pattern makers and seamstresses. Turn the ruler to cut three 90 degree triangles to complete 4 inches. Easy to Control90 degree double strip quilting ruler template can firmly clamp the quilting ruler, the template slides easily on the fabric until pressure is applied, the clip holds the fabric in place while cutting, eliminating miscuts, you can do it yourself Do a variety of different patterns by hand. Robust and DurableMade of PET material, it is good toughness and durability. Cutting HelperIt is a great tool for designers, pattern makers, seamstresses, and seamstresses, it is very suitable for garment sewing pattern design, drawing, cloth cutting, and other garment designs.