Shires Copper Lozenge Sweet Iron Three Ring Dutch Gag. The Shires Copper Lozenge Sweet Iron Three Ring Dutch Gag is ideal for dry mouthed horses that may tend to lean on the hand. The Gag is made from a combination of sweet iron that produces a sweet taste and copper inserts that encourages the horse to salivate and accept the bit. The Shires Copper Lozenge Sweet Iron Three Ring Dutch Gag uses a lever action which raises the bit in the horse\\\'s mouth this helps the rider to maintain control of the horse. Poll pressure is also applied when the reins are placed on the lower ring. When using the Korsteel Dutch Gag two reins may be used. One on the main snaffle ring of the bit and either of the other lower rings. If only one rein is to be used when using the Korsteel Dutch Gag then roundings should be used to help maintain a better contact with the horses mouth.