Easily cut 60-degree units, half units, trapezoids, and parallelograms with the Quilters Select 60 Degree Triangle Ruler. The acrylic, non-slip ruler features marking in 1/4" increments for unit height, markings for 60 and 30 degree angles, and center lines with 1/4" seam allowance. A great cutting system when you pair it with the Quilter's Select Dual Side Cutting Mats and Quilters Select Rotary Cutters!