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 Kuru Toga M5-450T is slight update on the original M5-450, now with a translucent upper barrel. Its a 0.5mm pencil with a fixed lead sleeve. 143mm long, approx 10mm diameter and 10g in weight. The polycarbonate barrel has a gently ridged grip section through which you can clearly see the 3-gear rotation mechanism in operation. The logo on the centre gear rotates visibly each time the tip is pressed to the writing surface. The lead rotates approximately 9 degrees with each contact - around 40 touches will rotate the lead completely.
There's a replaceable eraser under the push-button. Supplied fitted with 3 HB Uni Nano Dia leads - which are another innovation - being stronger than any previous lead due to some clever nano-technology.