For finer drawings the pin is of course great, because you can not immediately erased with the half drawing. He does what he should. Mir is the eraser but way too hard, the paper is very roughened while erasing, especially if you frequently erased at one point. Depending on the paper surface that falls first not so much, but then I color some with water colors and because it falls then on but because there is more color hanging on the rough spots.
