Cortex Screws with Hex Head (Self-Tapping) is utilized specifically in veterinary orthopedic surgeries. These screws have a self-tapping design that means they do not need a drilled threaded hole. They can tap threads into the material. They are used in soft bones during placement surgeries. They are specifically designed for veterinary orthopedic surgeries. These screws are very strongly built and can be tapped easily into bones during surgical procedures.