Faber-Castell Perfection Eraser Pencils

'Perfection' seems like a strong term. But it's hard to argue too much with it, when the product is so unique. These are eraser pencils. A pencil. But instead of 'lead' in the middle, it's eraser. So you can erase with precision just like you'd write or draw, and sharpen your eraser with a pencil sharpener (a blunt-tip sharpener for coloured pencils works best). Available for graphite or ink, or a double-tip version with one at each end. Graphite version is even available with a brush at the other end to brush away the rubbings - erasing the eraser bits!

If you have a use for these, there's nothing else quite like them. And if you don't, just enjoy knowing that such a thing exists.