Some jewelry has ends which can be removed and changed. Tribal Rites carries three types of removable ends. It is important to know which type of jewelry you want or have because three types of ends are not interchangeable ends are not interchangeable.
Almost all barbells have, at least, one removable end. Some barbells may come with one end fixed. This is because only one end is designed to be displayed. This is most common on labrets where the end is meant to be worn inside the mouth.