This is a Metal sew shank

file format: STL, OBJ, ZTL,

size: 22mm (you can modified as your requirement)

please send a massage if you need to know anything about desing

A shank is a device for providing a small amount of space in between a garment and a button. Shanks are necessary to provide space for fabric to sit in between the button and the garment when the garment is buttoned. Shanks also allow a garment to hang and drape nicely.