Hercules Hook - Official Website - Hercules Hook
"This isn't just another cheesy "As seen on TV" products. This one works. With the Hercules Hook ($15/set of 10) you can hang all of those beautiful pictures without breaking out the heavy duty screws and tools. Each small reinforced steel hook will support up to 150 pounds. Easily installs by hand, and when removed will leave a pin size hole. You're gonna love these so much that you'll be hanging things from one end of your house to the other."