A ferrule is a small metal or plastic ring that is used to strengthen or protect the end of an object, such as a pencil or a brush. It typically fits around the end of a handle or shaft, providing stability and preventing wear. Ferrules are commonly found in tools, sports equipment, and various types of furniture. In addition to their protective function, ferrules can also help secure components together. For example, in electrical wiring, a ferrule can be used to connect wires to terminals, ensuring a reliable connection. This makes ferrules important in both everyday items and specialized applications like electrical engineering.