By Sara Nephew60 degree ruler, twelve inches high from base to top. Use in speed-piecing methods to produce 90° triangle patterns or shapes. Triangle tool is ruled in black every 1/8". Lines are guaranteed to last. Easy to understand instructions included. Perfect for squaring up 60 degree blocks. Can be used to make: Tumbling Blocks, Seven Sisters, Grandmother's Flower Garden and more contemporary designs like Hollow Cube, Downtown and many more. Great for any project with 3-D effects; rotary cut equilateral triangles, diamonds, trapezoids, and more with this easy-to-use ruler. The right tools make the process so much easier!