BIC Evolution Triangle pencils in this box are no ordinary graphite pencils: they are made of synthetic resin and contain no wood. This is the result of a unique high-tech quad-extrusion manufacturing process, which gives them many advantages: resistance to shocks and chewing, and zero splinters in case of breakage. It took 10 years of research to make this material stronger and safer. In addition, the triangular barrel encourages optimum finger placement to ensure excellent grip and ease of use.