Omnigrid rectangle rulers are used for cutting strips and trimming fabric edges during quilt making or when executing a variety of sewing and fabric craft projects. Heavy-duty and durable acrylic material, use with a rotary cutter or a straight-edge blade. Laser cut edges for smooth, deep cutting and edge markings for accurate measuring. Omnigrid 3 x 15cm Metric Quilter's Ruler assists with quilting projects and has centimeter markings on it.