Save time with Sew Straight by sewing unmarked diagonal lines as Snowball or Triangle Squares. Accurately sew bias seams for Binding in a jiffy! Sew perfect 1/4in seams! There are countless ways to use Sew Straight!* No Key Needed* Sewing on Unmarked Diagonal Line* Sewing Miter* Sewing Accurate 1/4in Seams* Sewing Bias Seams for Binding* Sewing Diagonal Lines for Pieced Squares