Method of attaching an element to a drive shaft

A method for attaching a head to a drive shaft, comprising:

• winding a wire to create a drive shaft with an outside diameter;
• selecting a head having a length and having a bore with an inside diameter smaller than the outside diameter of the drive shaft;
• forming a tapered tip on a distal end of the drive shaft, the tapered tip having a length greater than the length of the head;
• placing the head on the tapered tip such that a distal end of the tapered tip extends from a distal end of the head;
• engaging the distal end of the tapered tip and turning down the drive shaft to create a turned down portion having a length equal to or greater than the length of the head and having a reduced outside diameter that is less than or equal to the inside diameter of the bore;
• advancing the head proximally over the turned down portion;
• and
• disengaging the distal end of the tapered tip, wherein, at or before disengaging, the turned down portion tends toward returning the reduced outside diameter to the outside diameter and is confined from doing so by the bore of the head thereby creating a friction fit between the drive shaft and the head.