Originally Posted by COWCHICK77
I have never seen one of those! I don't see that being any different than a mechanical hackamore other than the use of leverage.
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You can find a good description of how it works, and where pressure is distrubuted on the website for the Dr.Cook bitless bridle - Dr.Cook's bitless bridle and other variations of that bitless bridle would work in the same manner.
I wanted to edit this to add: this style of bitless bridle would be my perferred choice based on how it works compared to other set-ups out there. I have used the Dr.Cook's on horses that have never been bitless (there are other versions like the Dr.Cook that just don't carry the "name" to the price tag) - even my own when I first took him bitless - and I have never had too much problem in terms acceptance and response from the horse.