Add A-Quarter Ruler 1 1/2-Inch x 12-Inch Seam Allowance Trim Tool by Carolyn Cullinan McCormick for CM Designs

The Add-A-Quarter combines the speed of rotary cutting quilt pieces with the accuracy of using templates. Once your templates are made, the Add-A-Quarter will automatically add the customary 1/4 inch seam allowance to any straight angle and provide a straight edge for your rotary cutter.