Standard Big Ring Gag Snaffle Square TwistStandard Big Ring Gag Barrie Copper Round Twist The Snaffle is a popular bit due to the curved mouthpiece which distributes pressure more evenly over tongue and bars. With the offset centre link it will reduce nutcracker action and pressure points on the tongue. The Square Twist will create more pressure points on the mouthpiece which will make it stronger than the Round Twist and Smooth. Size: Ring 4 1 2" Mouth Piece 5 1 2"