Rotring Multi Pen Silver 600 3-in-1 2164109 rOtring Mechanical Pencil High-Class Writing Instrument Stationery Made in Germany Drafting Pen Professional Ballpoint Pen rotring 600 3-in-1 Part Number: 2164109 Mechanism: Twist Type Set Refills: Black (S0R074426), Red (S0R074422), Pencil 0.5mm HB (S0312650) A multi-pen that combines the 600 series with three functions: black and red ballpoint pens and a 0.5mm mechanical pencil. You can easily extend and retract the pen tip by rotating the knurled part under the red ring. The hexagonal shape and full metal body, which are symbolic of rOtring, give this pen a professional impression.