Unique angle cutting grid design: Easily makes 15°, 30°, 45°. 60°, and 90° cuts. This acrylic ruler is non-slip and is marked with black numbers and lines for clarity, your measurements will be clear and easy to read on light and dark fabrics. Has easy to read grid lines; 1-inch grid with 1/2-inch, 1/4-inch and 1/8-inch increments for precise measurements. For right or left-handed use! Acrylic frosted ruler.