Up for sale is an Adjustable Bias Tape Binding Foot - for Bernina new style sewing machines -

Fits Bernina Sewing Machine Models:  100, 120, 130, 135, 140, 145, 150, 153, 155, 160, 163, 165, 170, 180, 185, 190, 330, 350PE, 380, Activa 210, Activa 220, Artista 630, Artista 640, Artista 635, Artista 730, Aurora 430, Aurora 440QE & Aurora 450.   (And All New Style Machines  new 2, 3, 4, 5, 6, 7 and 8 series)

The binder foot is used to apply pre-folded bias binding tape.  Or you can cut yourself to the edge of fabric in one easy step to make your own bias tape.  It is equipped with a small funnel to fold and guide the binding over the fabric edge before it reaches the needle and can be used with either zigzag or decorative stitches as well as straight stitch.