Looking to find out how the bit listed above works, how to engage either the noseband or the bit, what it does in the horses mouth and its functions (what type of horse would work best in it). I don't have a horse right now that works well in a combo but i am curious to find out more info on this! Thanks.  :)

*a$$hole remarks or comments will be ignored. Please be kind. 

Pictured: windkeeper ??

*not my pic