Creative Grids 45 Degree and 90 Degree Triangle Quilting Ruler Template CGRMS4590 Make half square and quarter square triangles from strips 45 degree side cuts half-square triangles; 90 degree side cuts quarter triangles. 5 inch finished size The math required to cut these angles is incorporated into the easy to read black and white markings Slides easily over fabric until pressure is applied; gripper holds 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