The Metal Stud Fastener Kit from Peerless Industries is a kit that can attach equipment to wall studs. A single fastener can be used to secure equipment that weighs 35 pounds or less. It must be used with studs that are 25 gauge or heavier.
These metal stud fasteners do what they're supposed to but I had to take off stars because they are way too delicate. I broke 4 of them just trying to get them in the wall. I ended up having to run out and buy a second kit which was very frustrating. That being said, the TV's hanging on my metal stud wall and hasn't fallen off so that's a good sign. Just be very careful when you're installing these so that you don't snap off the plastic sides before you've gotten the fasteners set in the wall. They're very delicate.