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 with its specially designed lip will automatically add the customary 1/4 seam allowance to any straight angle and provide a straight edge for your rotary cutter. Reduces time and effort and is invaluable for both hand machine piecing. Also good for trimming off the excess fabric for your 1/4 seam allowance. Cuts multiple layers prevents template shaving and cuts at any straight angle.