The highest score possible with three darts is 180, commonly known as a "ton 80" (100 points is called a ton), obtained when all three darts land in the triple 20. In the televised game, the referee frequently announces a score of 180 in exuberant style. A "quad" ring appeared briefly between the triple ring and the bull in the 1990s, leading to a potential "240" maximum (three quad-20s), a "210" maximum checkout (Q20-Q20-Bull) and "seven" dart finishes from a 501 start (five quad-20s, triple-17, bullseye), but was swiftly dropped from professional tournament play after only two years. One make of this board was the Harrows Quadro 240.