<br /> <b>Omnigrip Combo Pack:</b> <ul> <li>The molded lines keep fabric from slipping, allowing for fast, accurate rotary cutting</li> <li>There are 1/2 and 1/4 markings and has 30, 45 and 60 degree lines</li> <li>Black markings</li> <li>For use with rotary cutters and straight edge blades (items not included)</li> <li>Contains one 10-1/2&quot; x 10-1/2&quot; quilter's square ruler, one 8-1/2&quot; x 8-1/2&quot; quilter's square ruler and one 6-1/2&quot; x 6-1/2&quot; quilter's square ruler</li> <li>Each has 1/2&quot; seam allowances</li> </ul>