Professional's Choice Bob Avila Seven Shank Bit with Medium Port RollerProfessional's Choice Bob Avila Seven Shank Medium Port Roller Mouthpiece Width: 5 1 4" Bar Width: 1 2" Purchase: 2 3 4" Shank: 5 1 2" Cheek: 8 1 4" Port Height: 2" Width: 1 1 2" Features: Copper roller, copper inlay The Seven Shank design is weighted with an embellished cheek for the show arena. This bit features a medium port and copper roller that work off bar and palate pressure. The mouthpiece offers moderate tongue relief. Good for working with