The Kuru Toga Series from Uni-ball Mitsubishi has a core rotation mechanism that can automatically rotate the pencil lead as you write. The lead is twisted through a spring-loaded clutch, it works by twisting incrementally every time you lift the pencil up (i.e. during printing words, etc.). This allows a uniform wearing of the pencil lead so that it always remains as a pointed tip. So you can easily avoid the usual problem of using pencils.
Enjoy the second generation Kuru Toga pencil with an aluminum grip and high-quality plastic body.