Victorinox 7" Butcher Knife, Straight Blade, Black Fibrox Handle, 40635. Modern nylon and patented Fibrox handle is hygienic, dishwasher safe, slip-resistant and NSF approved. The handle is ergonomically designed to help minimize tension at the wrist and provides a much more comfortable grip than rosewood handles. A butcher knife is an utilitarian knife. It is used primarily for the butchering and breaking of meat. The butcher knife is used throughout the world in the meat processing trade.