Get perfect fabric cuts with the Omnigrid Square Quilting Ruler and complete your projects quickly. This ruler is made of high-quality acrylic plastic and sports a two-colored, laser-cut grid with 0.002-inch accuracy for easy reading on light and dark fabrics. The ruler also has bias lines at the bottom and a left-handed and right-handed numbering system to prevent the turning and flipping of the ruler. You can use both sets of diagonal lines.