BERNINA Standard Adapter Shank #75 Adapter shanks are used to attach various accessories to the machine. This special sewing accessory is used to attach Simple binder #85, as well as Ruffler #86 for gathering and pleating various types of fabric. Acting as a connecting piece, Standard Adapter Shank #75 is designed to fit precisely between the needle bar and the accessory you wish to use. The individual accessories can be screwed onto the Adapter shank in a single step. The standard connector •To create ruffles along with the Ruffler foot #86 •Easy to install •For 5.5 mm and 9 mm machines