Add-A-Quarter Plus Ruler, 12in

Has a 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. 

Allows you to use your rotary cutter when piecing to trim excess fabric & provide a straight line for placement of your next fabric piece. This is great for foundation paper piecing.