French mouth egg but blue steel gag bit

Gag bit: Works on the horse's balance forces him to get his own balance. ant putting his weight on his hindquarters. It needs specific cheek parts. If can also be used with only one pair of reins, or with bit loops, or with 2 pairs of reins. 

French mouth bits: Avoids pinching the tongue. More comfortable for the horse, the action is balanced on both sides by the central part. Avoids any action on the palate.