This presser foot requires a small screw to be inserted into the side holes, which have a diameter of approximately 1.5mm. I took the screw from an old part I had, but it’s important to handle this process carefully to avoid breaking the plastic piece, as it can be fragile. I recommend slightly heating the screw before inserting it into the holes. This method allows the screw to fit smoothly and hold securely without damaging the part.