Jump'In French mouth Eggbutt Gag bit with roller and high portComposition: German Silver (65% copper, 23% zinc, 12% nickel) is a relaxing and solid alloy. Effect: this bit has an action on the horse's balance. It causes the horse to rebalance and transfer its weight to the hindquarters. The larger the rings are, the stronger the gag action is. The fixed eggbutt typed rings add a slight lever action. Tips: This bit requires special cheek pieces and can be used with two reins, bit loops, or four reins. Maintenance