The Uni Kuru Toga pencil is truly - and literally - revolutionary.

When using a normal mechanical pencil at a typical writing angle, the lead point quickly becomes chisel-shaped. This leads to broader, less precise lines; and crumbling of the resulting sharp edge. The unique gear mechanism of the Kuru Toga rotates the lead every time it is touched to the paper, resulting in a clean cone-shaped tip which is sharp and resistant to breaking. Simple, yet brilliant. We've been using early samples from Japan on a daily basis since the end of 2008 and they really do work.

The Dive model is a different twist on the Kuru Toga, a mechanical pencil with a cap. Other auto-advance pencils rely on the lead sleeve touching the paper as you write or draw, using the paper pushing on it to pull the lead forward each time you lift up again. The Dive feeds lead forward very slowly as you write or draw, without the sleeve needing to make contact with the paper, making for a smoother writing experience. Adjustment dial just behind the tip lets you select how quickly the lead feeds, to more closely match what you're using.