This foot has a special guide groove in its sole. The piping or cord is fed precisely via this groove and can thus be inserted between two layers of fabric professionally. It can also be used to create piping tape with your own fabric.
 
Item no.: B5002-05A-C
(Genuine Part - Babylock Authorised Stockist)
 
Compatible with Babylock Coverlock / Coverstich Machine Models -
Desire 3
Euphoria
Coverstitch 
Evolution
Gloria
Ovation