NeoGrip Quick Release Chromosome Surgical Derf Needle Holder 4 3/4" Serrated Tungsten Carbide is designed to work with the surgeon's hand for improved grip, balance, and efficient maneuvering within the surgical site. This easily handled instrument does not cause muscle fatigue or cramps while working for a long time. In addition, it has medical-grade stainless steel, which makes it surgeon's prior choice.