This is a Raw Edge Braid Or Tape Binder Attachment With Tape Guide for Industrial Sewing Machines.
This binder folds the tape in half around the fabric and makes RAW finish top and bottom. It is used to insert Tape, Braid, or Binding along the edge of the garment as shown in the diagram.
This binder will fit most industrial and home sewing machines with attachment mounting holes in the machine bed including, Bernina, Brother, Consew, Gemsy, Juki, Mitsubishi, Rex, Singer, SunStar, Tacsew, Yamata and many more.
The mounting screws are free of charge, they maybe don't suit some PFAFF BERNINA machines!