Baby Lock 42mm Double Fold Bias Binder with Guide RakeBaby Lock 42mm Double Fold Bias Binder with Guide Rake (D13 4 12E). The double fold bias binder is a quick and precise solution when you want to bind fabric edges or necklines with a bias tape using the cover stitch or double chain stitch. Both the upper and lower side of the bias tape are folded double here. Inlet 42mm For use with knit and woven fabrics. Compatible machines: Ovation Gloria Triumph Coverstich