Tool-free picture hanger

From the website:

Push & Hang™ — Hang a Picture or Mirror in Seconds

You’ll never use a hammer again!

Just push into the wall and hang your picture.

Each Push & Hang is easily removable and reusable.

No drilling, finding studs or dealing with anchors needed.

You get 10 hangers that hold up to 60 lbs. each and 20 hangers that hold up to 10 lbs. each.

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30 hangers cost $19.95.