Kadokeshi 28 Corner Eraser

The idea for this unique shaped plastic eraser is that 28 corners are better than 8.

Kokuyo Co. Ltd., the maker of the Kadokeshi Plastic Eraser, says that when people use a standard rectangular eraser, they always use one of the corners. This is because the pointy-nature of a corner provides them with the accuracy needed to remove errant characters and marks. But when all eight corners of a rectangular erases have been rounded down, the eraser becomes less effective.

Thus this new design gives the user plenty of corners. When one of the cubes on this eraser becomes completely rounded off, you just cut it off, giving you access to new corners.

Thanks to Tim Hong