One of the most prominent characteristics of a gut knife is the hook located on the back of the blade. Initially, this feature gained popularity as a useful tool for cleaning game in the field. However, it also proves useful for smoothly cutting through tough materials, such as rope, webbing, or safety belts. The knife's surface has been intentionally given a patina using a blend of lemon and mustard. If you think it's messy now, wait until you see it under a blacklight