THIS IS OUR PROTTI PRD 105!
A mechanical pencil in black, with a diameter of 0.5mm our double chuck mechanism.
![](https://penac-brand.de/wp-content/uploads/2019/07/pfeil_9.png)
![](https://penac-brand.de/wp-content/uploads/2019/07/pfeil_5.png)
Our unique mechanism allow you to write up to four times longer than with conventional mechanical pencils.
![](https://penac-brand.de/wp-content/uploads/2019/07/pfeil_11.png)
A mechanical pencil in black, with a diameter of 0.5mm our double chuck mechanism.