The Korsteel Copper Roller Mouth Dee Ring Snaffle is a great choice for horses who have trouble relaxing and accepting the bit. The large copper roller both increases salivation and encourages the horse to chew and roll the link which in turn softens the mouth and promotes bit acceptance. The heavier mouthpiece and Dee cheeks will help to keep the bit quiet and stable in the mouth allowing the horse to move it on his own. Size: 5"