The world's first mechanical pen with a self-rotating mechanism! Its unique gear mechanism rotates the lead each time it comes into contact with the paper, so your tip remains cone-shaped and is far more resistant to breaking. The rotation of the lead makes the writing line even thanks to the innovative "KURU TOGA ENGINE" mechanism, which is why the lead rotates slowly while writing, and that way it sharpens itself. Lead writes with a clear, thin line of a constant thickness. The high-quality plastic barrel has a transparent part where you can see the 3-gear rotating mechanism in operation, the stainless steel tip and a built-in eraser under its push button. It comes supplied with 3 HB Uni Nano Dia leads - another innovation - being stronger than any previous lead due to some clever nano-technology. New lead technology allows writing even when the lead is retracted, protecting it from cracking. Dimensions: 1,5cm x 8cm x 19,8cm. Lead thickness: 0.5 mm. The price is per piece, the commercial package is 12 pcs.