DRITZ-Omnigrid Ruler. Made from durable premium quality acrylic plastic and laser cut for a smooth edge that allows for easier deeper cutting of fabric layers. This ruler was design for use with rotary cutters and straight edge blades. Use to cut strips; shapes and bias pieces. Includes 30; 45 and 60 degree angles with extra 1/2in for seam allowances. Ruler measures 24x3-1/2in. Clear with black and yellow marking. Made in USA.