Professional's Choice Yukon Shank Twisted Wire BitProfessional's Choice Yukon Shank Twisted Wire Bit Mouthpiece Width: 4 3 4" Bar Width: 3 8" Purchase: 3" Shank: 4" Cheek: 7" The Yukon has more purchase than a traditional shorter shanked bit. This encourages ideal break at the poll while the shorter shank allows the bit to be more forgiving and encourage lateral movement. The two piece twisted wire mouthpiece is a little more aggressive than a smooth mouthpiece, which lends more response and respect