You've definitely used dry-erase markers to mark up a whiteboard in a classroom or at the office—they’re so ubiquitous, ...

The EXPO Low Odor Dry Erase Markers might be just what you need ... environments where information changes constantly and the whiteboard needs to be cleared frequently for new ideas.

But a dry erase marker won’t turn any heads. And this one holds its own little secret. It acts as a master key for hotel room door locks. This is really more of a repackaging hack. The exploit ...