Universal binder attachment is intended for binding edges with bias tape. For best result we reccomend to use binder foot (for Bernina foot #95).
#87 is intended for binding edges with pre-folded (twice folding) bias tape.
#88 is intended for binding edges with not folded (four folding) bias tape.
Set include: binder, mounting plate and guide.
Screws are HERE.
Suitable for most known sewing and cover machines: Bernina, Janome, Juki and many others.