The fixed cheeks on bits such as the Eggbutt or full cheek snaffles can offer a more stable feel for the horse and encourage them to take a more consistent contact, taking the rein forwards and down and offering directional control. The loose rings discourage horses that are likely to fix and block through the rein and gives the rider the option to gently vibrate the horse off the rein should there be the need.
Impulsion is the movement of a horse when it is going forward with controlled power. In relation to collection, impulsion helps a horse effectively use the power in its hindquarters. […]