Invention: Mag-Net

Ever drip something down a hug flight of stairs and you think, "how will I survive being attacked by this demon?"
Well, do it no more. Instead, let's create a magnetic net that you can throw towards this items and catch them.
Why would you need this? To escape a killed and get a car key. To suspended some small object between pieces of metal! To paint some metal things. The list goes one, but not on and on.
Will you buy? Yes. Instant millionaire.