BERNINA Serger10/40 Double Fold Binder C22 for L890

With the single fold binder, fabric edges and neckines can be perfectly bordered wth bias tape.  The unfolded tape is inserted through the attached guide rail, folded over teice on the upper side while the under side remains open and is then sewn on with a cover stitch.  For the perfect look, the bias tape can also be self made.