The rubber eraser is roughly 250 years old. But for all its old age, the partner to any pencil has always had one major flaw. You can’t see what you’re erasing. Until today. Seed says they came up with the concept of a clear eraser five years ago. But it took years of testing before they arrived at the exact formula that would produce a translucent yet functional eraser that would not crumble.

The official name of the eraser is the Clear Radar. Spoon & Tamago has the details on where you can get your hands on these marvels.