Ergonomically designed with a non-slip surface, this set features easy-to-grip pens with a .5mm high quality nickel-silver rollerball tip for extremely smooth writing. Bionic Worker utilizes the latest bionic liquid ink technology. The fun orange shaft color offers a stand-out alternative to the uniform gray, black and blue pens. Ideal for professionals and frequent users, the unique design allows for relaxed fatigue-free writing.