Bombers Polo 3 Ring Reversible BarrieA Ring cheekpiece introduces poll pressure as well creating leverage on the mouthpiece. The Barrie Reversible is a severe bit due to the center links of the two pieces being offset by 20mm giving it a double nutcracker action, which creates more tongue and bar pressure. It is a versatile bit that can be flipped and used either way. The Round Twist providing a harder bit and the Smooth creating a more forgiving and softer bit. Great bit for the