Professional's Choice 7 Shank Collection - Square Port BitThis 7 Shank is 6 long and has quite a bit of weight behind the mouthpiece, which allows a quick release from the riders hands. This is an excellent transition bit out of an o ring or d ring. This 5 1 8 square spoon port mouthpiece has a 1 2 wide port. The width of the port is comfortable for the horse while encouraging collection. Port: 1" SKU: PCB 1045