2 Pieces set of wire twister includes: (1)... Tungeten Carbide Surgical Wire Twister 7.00", Working End 2cm, Net Weight 2.07 oz. (2)... Tungeten Carbide Surgical Wire Twister 6.00", Working End 2cm, Net Weight 1.26 oz. SUPERIOR INSTRUMENTS TC Sternal Wire Twister is used for twisting wire or stainless steel sutures together, most commonly when closing the sternum. The cross-serrated working surface firmly holds wire and the ratchet locks jaws into place so the wire can be twisted. TC instruments are designed to stay sharp for a significantly longer period of time than other standard instruments. SUPERIOR INSTRUMENTS permanently bonds tungsten carbide inserts to the instrument, which maximizes control and precision.