A horse shaking its head when bit pressure is applied or its tongue trying to escape the bit are classic signs the horse has a sensitive tongue. With this in mind the McHardy was created, it has a medium port creating space for the tongue relieving pressure. The Buster Roller in the middle increases bar pressure and as a result lifting the horse's head and giving more control.
This bit is suitable for a horse who may feel dull in the contact, may slightly lean but not quite ready or needing to go to a Buster Roller or DC Morgan. Dressage Legal