Found this website linked from FHOTD, they show a couple of pics of the bits on the blog, but I thought I would post some of them here too. These are some real pieces of work here.
The website raves about how wonderful these things are for starting horses. Starting what? Ruining them? The links on the chain mouth ones have the links welded together in three sections. Are you kidding? This would lacerate the bars of the mouth and the tongue if used too roughly, oh and lets add a gag action and a curb chain too, just to make it a bit better. And ooh! What if we made GAG bridles with them? Then we could tear up their lips too!