Omnigrip 2-1/2-Inch-by-18-Inch Non-Slip Quilter's Ruler<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Omnigrip Non-Slip Quilter's Ruler features a right and left handed numbering and angle system</li><li>Triangle cuts are easier with the diagonal lines</li><li>Has an extra 1/2 inch on two sides for seam allowance</li><li>This 2.5 by 18 inch ruler has 30， 45， and 60 degree angle markings</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31Tglq%2BwSVL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31QdS%2B7h1SL.jpg" noproxy>