Professional's Choice 7 Shank Floating Port Bit with Copper BallsProfessional's Choice 7 Shank Floating Port Bit with Copper Balls Mouthpiece Width: 5" Bar Width: 1 2" Purchase: 2 1 2" Shank: 4 1 2" Cheek: 7" Port Height: 1 1 2" Width: 1" Bit Material: Copper ring roller bars The 7 Shank has quite a bit of weight behind the mouthpiece, which allows a quick release from the riders hands. This bit is going to be slightly more aggressive due to the textured copper balls on the bars of the bit and the floating port.