rotring 4-in-1 multipen. Smooth writing, long lasting and precise. Heavy metal hexagonal barrel with cylindrical knurled grip. Non-slip grip is comfortable for frequent writing and doodling, and it's this section you remove to get to the refills. 

Twist the knurled button to select. Features a red ballpoint, a black ballpoint, a blue ballpoint and a 0.5mm mechanical pencil. 

Refill using D1 refills and 0.5mm lead.