The Kuru Toga Advance has a core rotation mechanism that continually rotates the pencil lead as you write. A spring-loaded clutch twists the lead incrementally every time you lift the pencil from the paper, allowing a uniform wearing of the lead so that it always remains pointed.
The new W-Speed engine turns lead twice as fast as the original uni Kuru Toga for continuous sharpening.
Uni Pencil Lead,''The Uni'' Smudge-Proof Leads 0.3 HB (ULS0325) x 25 leads x 3set = Total 75 leads