Use one tool for straight edge and for trimming 1/4 inch seam allowances and paper piece 25% faster, with less motion! The specially designed lip on these rulers automatically adds the customary 1/4in seam allowance to any angle and provides a straight edge for your rotary cutter. The Add-A-Quarter PLUS rulers feature a tapered edge to fold back foundation and are wider for easier handling. Package includes two rulers, 6 in. long and 12 in.