HARROWS DARTS STEELTIP BLACK JACK 22g Darts Steeltip company Harrows model BLACK JACK22 gK - 22 gram.  Black Jack   darts designed for average advanced players. They are characterized by tungsten barrel appearance and black knurling. The advantage of this series is maximum grip as also optimal control. The darts have tips Steeltip i are designed to play on sisal and paper boards.