Perfect Diamond and Triangle PiecingFrom the inventor of the popular Add-A-Quarter line of rulers comes this small, easy-to-use acrylic tool that allows you to trim the tips from triangle-shaped quilt pieces for more accurate piecing. Simply line up the tool on the noted angle and cut off the corners with a rotary cutter! This affordable, must-have tool can be used with templates or your favorite method for making triangles for more precise piecing. + From Add-A-Quarter inventor and expert paper piecer Carolyn Cullinan McCormick.+ Calling all perfectionists! Make accurate piecing easy with this unique tool.+ More angles, more options! Piece a huge variety of angled designs.