This bit by Professional's Choice is from the 7 Shank Collection and has a bit of weight behind the mouthpiece allowing for quick release from the riders hands. An excellent bit for transitioning out of a D-ring or an O-ring bit. The square port is more aggressive than the traditional round port since it focuses more on the corners of the mouth. The twisted bar pieces are more aggressive on the tongue and pallet.

Professional Choice

7 Shank Collection

Floating Port Bit

Twisted Bars 

Mouth: 5 1/8"

Cheek: 6 1/2"

Port: 1 1/2"