Baby Lock Double Fold Bias Binder 28mmBaby Lock Double Fold Bias Binder 28mm. 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 28mm outlet 7mm. For use with knit and woven fabrics. Compatible machines: Ovation Gloria Triumph Coverstich Desire Evolution Euphoria