Pilot Birdy Switch Multi-Pen
A Japanese exclusive, this very slim silver device is a 0.7 mm ballpoint pen AND 0.5 mm pencil combo. Just uncap one side to find a mechanical pencil, and switch the cap to the other side to discover a ball point pen.
It is perfect for small notebooks, wallets and PDA cases. Measures approximately 4.7 inches long and also features a convenient clip.