The legendary good Tombow Mono eraser in the form of a pen, Tombow Mono Zero is great for those who like to erase ultra-precisely. The working principle of Zero is similar to the mechanical one - the eraser appears when you press the button, and when it costs, you press the button again. The eraser has a size of 2.5x5mm, so we could use all the other erasers you've used so far. The rectangular cross-section ensures that you always have one edge, which is especially good for deleting. Zero eraser is ideal for summaries and notebooks and for working in small boxes.