Includes 30°, 45° and 60° angles. Use to cut, square and trim blocks. Great for lap work, baby quilts and checking finish size of blocks. 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.