Retro 51 Tornado Pencil - Sir Isaac
The Retro 51 Tornado Pencil in Sir Isaac, is a 1.15 mm pencil that operates with a simple twist of the top and has a huge eraser on top for those of us who make an occasional mistake. The Sir Isaac features graphics and formula print showing Sir Isaac Newton. Comes in matching tube.
They are just as easy to use as their rollerball cousin, and come with a generous supply of extra lead and erasers.