Rotating wire twisters are less complicated and more easily manipulated than wire-twisting forceps.  Accordingly, the allowed for sutures to be drawn closely together before twisting commenced and there was les tendency for wires to escape the grasp of the instrument.  Some designs require that the ends of the wire suture be fed through fenestrations while others employed an S-shaped component that allowed for sutures to be introduced from the side at any point along the end of the suture.