This small metal trinket lets you draw straight lines without a ruler - Yanko Design
Briefly

No one can draw a straight line unassisted, not unless you're one of those extremely rare geniuses.Even professional artists and designers don't leave straight lines up to chance or fate, utilizing a tool to ensure those marks keep in line.The most common tool for this kind of drawing is, of course, the ruler, and it doesn't get any simpler than a piece of wood, metal, or plastic with a straight edge.
Read at Yanko Design - Modern Industrial Design News
[
|
]