Professional's Choice 7 Shank Square Port BitProfessional's Choice 7 Shank Square Port Bit Mouthpiece Width: 5" Bar Width: 3 8" Purchase: 2 1 2" Shank: 4 1 2" Cheek: 7" Port Height: 1 1 2" Width: 1 1 2" This 7 Shank Square Port Bit is 7 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 square spoon port mouthpiece has a 1 1 2 wide port. The width of the port is