tungsten carbide Stratte needle holder is a ratcheted finger ring instrument with curved, half serrated jaws ensuring a firm grip on the needle. They are designed for use with 2-0 and 3-0 sutures. The needle holder is ideal for hospitals and specialty clinics.TC instruments are designed to stay sharp for a significantly longer period of time than other standard instruments. SMS permanently bonds tungsten carbide inserts to the instrument, which maximizes control and precision. TC instruments are identified by gold handles.