Add-A-Quarter Plus with its specially designed lip automatically adds the customary 1/4" seam allowance to any angle and provides a straight edge for your rotary cutter. The tapered edge is used as a straight edge for folding back the foundation. Used for foundation paper piecing to trim excess fabric and provides a straight line for placement of the next fabric. With templates, Add-A-Quarter Plus combines the speed of rotary cutting with the accuracy of using templates. Includes both the 6" and 12" rulers.