Are they made out of stainless steel? Can they be used outside?
Yes, these magnetic hooks are made of stainless and can be use on outside.
Will these rust in a shower?
No, they are waterproof.
Can these put outside of your gril ?
Yes, if your grill is steel and not aluminum.
How do you attach the hook to the magnet?
The installation is very simple. You can watch the video. Just put the hook into the two small holes on the left and right sides of the protruding part of the magnet.