I have to disagree with you, chain mouth pieces are very soft. They form great to the horses mouth and are great for starting horses. Bits are only as strong as their users. I have seen plenty of people pull their horses faces off with plain snaffle bits.
Thank you for your opinion. I agree that a bit is only as harsh as the hands behind it, but I would never slap a chain bit on a horse with a relatively inexperienced rider; the possibility of something going wrong or hurting the horse is much greater with a chain mouthpiece than a solid mouthpiece.
I'm sure in the right hands, a chain mouthpiece is an okay training tool... though my horse will never see one and I won't encourage people to purchase one for their horses either. If you so much as see-saw a little with your hands, that chain can bite pretty good.
First of all, it's Baucher. Second of all the guy who invented the bit also advocated for Rolkur.
The top ring connects to the cheek piece and the bottom ring connects to the rein. A lot of people will try to tell you it's a leverage bit.. I disagree. It's exactly like using a dutch gag on the snaffle ring. Apparently if the horse lifts its head there is some magical leverage action, which I find doubtful. To me, it just seems like it would act almost like a full cheek.
Accourding to Dover its Boucher - Happy Mouth Boucher, and AlBaCon Boucher is what they sell, and that's the only way I even know it exists so I was just going on that. Googling Baucher I see that the mans name was spelt Baucher, you'd better tell Dover that!
I had my doubts on it being a leverage bit as it is dressage legal so I was curious on what it actually does do.