Guidelines 4 quilting tools help you prepare yourself, your sewing machine, and your fabrics for perfect piecing. Ruler 6x12- slide and lock the built-in fabric guides onto any line, 1/8" increments, on the ruler and cut accurately every time. The fabric guide catches the fabric's edge for perfect alignment, making it great for repeated cutting of widths. Insert purple marker on the angle line you need. You are able to make a 6"x 24" or 12" square when needed with connectors and other rulers, sold separately. Bottom has non-slip grips. Made of polycarbonate 25 times stronger that acrylic.