Create half-square triangles (HST) in multiple sizes using the same tool. Whichever technique is used in the pattern you choose can be completed with this ruler. Instructions show four different ways to sew HST's. Method #1 - Create eight half-square triangles out of a set of squares. Method #2 - Cut ready to sew sets of triangles from strips. Method #3 - Mark and Sew 1/4" seam lines. Method #4 - Trim Over-sized HST's to the correct size. Choose the method that works best for you. The ruler slides easily over the fabric until pressure is applied. Then, our exclusive gripper holds the fabric in place while cutting, eliminating slipping and miss-cuts! Total Size - 5-1/2in x 10-1/2in Creative Grids® products are made in the USA and sold in independent quilt shops only.