TSMSTSliding Barn Door Stopper for Track, Easy to Install,Upgrade Adjustable Spring Barn Door Stoppers 2pcs

Will these actually work on a two inch track? A question below says it will, but the product descriptions says the max width these will fit is ~1.5".

Is this bronze or black?

Can you install these without needing to slide them down the track past the bolts? I want to install this in the middle of the track, not the ends...

Door height 81" with molding 87 1/2". Can the hardware fit over the top and not have a gap at the bottom for an 84" door?