A figure-four is a grappling joint-lock that resembles the number "4". A keylock or toe hold can be referred to as a figure-four hold, when it involves a figure-four formation with the legs or arms. If the figure-four involves grabbing the wrists with both hands, it is sometimes called a double wrist lock. A figure-four hold done with the legs around the neck and (usually) arm of an opponent is often called a triangle choke, and is a common submission in mixed martial arts and Brazilian jiu jitsu. Prior to this, this form was in Japanese martial arts, where it is known as Sankaku-Jime. The wrestling move figure 4 leg lock was made famous by WWE Hall of Famer Ric "The Nature Boy" Flair.