Omnigrid Rulers are made from a durable, premium quality acrylic plastic and laser cut for a smooth edge that allows for easier, deeper cutting of fabric layers. The patented double line effect is printed in black and yellow which allows the user to see the grid on both dark and light fabrics. Designed for left and right handed users. 6 1/2 x 24 inch ruler is a timesaver for cutting borders when quilting. This ruler has 30 degree, 45 degree and 60 degree angles lines marked for easy alignment of fabric.