The Greeley gag bit is 9 ¼” long which gives the rider leverage when needed. The limited travel of the cheek provides excellent shoulder lift as well as collection. This encourages the horse to stay on their hind end around the turn and to break at the poll. This is a great bit for a finished horse that needs to stay round and keep their shoulder up in the turn.
The 5 1/8” twisted low port mouthpiece is slightly more aggressive and provides the benefit of extra collection while still allowing for flexion and bend in the horse’s body.