I attend art school and we explore all different types of medium. I love pencil and colored pencil, but have made many marks on a pristine paper by trying to rub off my eraser mistakes. Especially with pencil, a kneaded eraser doesn’t cut it. I have an electric eraser and it just bores a hole in my paper.I find using the plastic pen-like eraser very practical. This handy tool lets me remove my eraser bits (and sometimes there are many!) without smudging the work. And that is a big win for me! If you are a student of pencil drawing, or an accomplished artist, you need one of these.