Short adapter shank #77 is the shortened version of Standard adapter shank #75. Serving as a connecting piece between needle bar and accessory, Short adapter shank #77 allows other manufacturers’ presser feet to be used on BERNINA machines.
If these feet are short-shanked, they won’t fit on the machine’s standard holder without an adapter. By contrast, Standard adapter shank #75 is used e.g. with BERNINA sewing accessories such as Simple binder #85 or Ruffler attachment #86. Please note that, unlike with the Simple binder, the special BERNINA Binder foot #95 is to be used for binder attachments for pre-folded (#87) and unfolded (#88) bias tape. This will ensure the optimal functioning of these presser feet.