Wearing a Neck Knife around the neck has turned out to be very handy in many situations. The knives usually have a fixed blade in a compact build and come with a Kydex sheath for safe storage. Even users lacking pants pockets have the option of having their knife on hand at all times. The knives are often suspended from ball chains, which makes them safer to wear because the chains break under a certain amount of strain. Unlike the also popular cords, the chains prevent accidental strangulation if it gets entangled.