Includes 3″ corner 1⁄8″ mini grid for miniatures and diagonal angle line. Use to cut squares and trim blocks. Ideal for checking diagonal half squares, miniatures, lap work and squaring. Made of strong and durable premium quality acrylic plastic. Unique black and yellow double sight lines for easy viewing when working with light and dark fabrics. Laser cut to within 0.002″ accuracy with a smooth finish. Specially designed for right and left handed use.