A knife is a tool with a cutting edge or blade, hand-held or otherwise, with most having a handle. Some types of knives are used as utensils, including knives used at the dining table (e.g., butter knives and steak knives) and knives used in the kitchen (e.g., paring knife, bread knife, cleaver). Many types of knives are used as tools, such as the utility knife carried by soldiers, the pocketknife carried by hikers and the hunting knife used by hunters. Knives are also used as traditional religious implements. Some types of knives are used as weapons (like the daggers used by commandos, or the switchblades used by gang members).
Every chef carries his special set of knives. There are myriad uses for knives, which are probably the most ancient of tools created by early humans. Find what you need via video, or sell what you have!