Karl Lagerfeld has another unexpected side project in the works. French luxury goods brand S.T. Dupont has tapped the designer to create a range of stylish highlighters and pens–but not just any pens. Karl, who famously uses Shu Uemura nail polish to sketch his designs, somehow incorporated the polish into the ink of the pen to create a “burgundy lacquer,” according to WWD. Also, the writing instruments are apparently “fan-shaped” so that they fit neatly between fingers and won’t roll off of your desk.

According to their website, S.T. Dupont created a “revolution” in 1973 by releasing the first ever luxury ball point pen. They were also chosen by the French government to furnish the official wedding gift to Prince William and Kate Middleton. No word yet on the price point of Lagerfeld’s pens or whether or not they will be available in the U.S., but, to give you an idea, this limited edition black mother of pearl fountain pen retails for just under $2,000.