I am about to take a 4500mi journey coast to coast and excited I didn't have to buy new panniers for it.

I installed them on an older Overland rear pannier.

They work great! I like the way they securely hold onto my rack rails.

 

They stay put despite the bumpy riding and then taking the panniers off is a cinch because of the way the clips flex.

 

These were the trick. They really stiffened up these boxes on my fat tad. Bonus they came in orange.

I installed my Pannier Hooks to the back of a fully loaded TimBuck2 Messenger Bag. They've been a dream!