This 45-degree Kaleidoscope and Dresden Plate Quilt Ruler from Creative Grids can make designs created with eight separate 45-degree triangle units. Cut triangles up to a finished height of 8" to piece blocks that measure up to a finished size of 16". You also can use it to create a sawtooth border. The ruler slides easily over fabric until pressure is applied. Then, its grip feature holds the fabric in place while cutting, eliminating slipping and miscuts.