The configuration of a biker patch can be a signal of the type of motorcycle club to which a rider belongs. Clubs' patches come in one, two or three pieces. A one-piece patch generally signifies a motorcycle association, often associated with a particular manufacturer. A good example is the Harley Owners Group (H.O.G.). A two-piece patch usually signifies a riding club. A three-piece patch is usually, but not always, a sign that a biker belongs to one of the notorious "outlaw" motorcycle clubs. According to motorcycle writer Dan House, some of the best-known outlaw motorcycle clubs include the Hell's Angels, the Bandidos, the Pagans and the Outlaws.