This bit is often suitable for horses that struggle to accept a conventional metal bit, and those with light or sensitive mouths that can nevertheless become strong and need a little extra control. The soft, elastic nature of the mouthpiece dissuades the horse from pulling and fighting the contact, as it is so gentle there is little for the horse to object to.
This kind of snaffle is suitable for horses with a strong mouth. It is reinforced in order to allow the ring to rotate.