Cozy Quilt Designs rulers are designed to make sure you get amazing and fast results. Boldly marked for great readability these rulers are made of a clear acrylic. Cutting corners- turn ordinary into extraordinary with a simple ruler that works wonders. This clear acrylic ruler with black markings from 1/2 inch corner cut to 5 inch corner cut, gives you simple and accurate measurements to eliminate a corner from a block, square, rectangle, or triangle, while leaving the seam allowance on the remaining piece. Just add another fabric and turn plain blocks into complex beauties. Comes with 16 pages of step-by-step directions and a bonus pattern