Two diagonal grooves act as a guide, making zip insertion a breeze compared to the standard method. Located in the sole of the foot, the grooves easily accommodate the zipper coils, which are fed through at the same time as the zipper tape is guided under the foot and sewn.
 
Please Note - These feet are designed to fit close to the coil on the zips, however some zips sold in the UK, in particular some YKK zips have slightly larger teeth which don't always go through the 35V foot - However - this can be overcome by using the Adapter Clip On Shank #78 and the Bernette clip on Concealed Zipper Foot.
 
Category B / C / D / Ea 2-4 / Eb2-4 / EC and F