Creative Grids multi-purpose House ruler is designed to cut a multitude of shapes “House” shapes, “barn” shapes are fast, easy and accurate to cut with this one ruler Use for half-square triangles, quarter-square triangles, trapezoids, parallelograms, diamonds from squares and rectangles Slides easily over the fabric until pressure is applied. Gripper holds the fabric in place while cutting, eliminating miss-cuts Comes with fully illustrated step by step instructions or scan the QR Code printed on the ruler to view a video demonstration