We love the Centaur® Anti-Grazing Device because they are great for children on ponies. No more grazing while riding. These strong nylon reins are a great aid for youngsters and are adjustable to fit most animals. No more children's tug-o-war with hungry ponies! The anti-grazing device applies upward pressure on the bit when the pony puts its head down to prevent grazing while being ridden. The anti-grazing device is made from 3/4'' brown nylon. The crown piece of the device attaches to the pony's bridle with velcro tabs. The reins are snapped to the bit and the dee rings on the front of the saddle. Buckle adjustment on each rein allows device to be used on different size animals. The anti-grazing reins adjust from 35 1/2 to 45 inches Add more holes to make smaller (28 inches)