Quickly cut triangles, diamonds, and trapezoids using this ruler. The extra diagonal lines allow for keeping the 60 degree angle true. The right tools make the process so much easier! Of all the 60° rulers, this is the one, this is my favorite one. It comes to a full point which leaves you with little dog ears on the tips and sides of your triangles. They can absolutely be trimmed off but I like to use them to help me line up my triangles.