Pico-Pin is a new compression screw without canalisation and with integrated wire guidance. This serves as guiding wire which is preferably used with ordinary Herbert Screws. Due to the innovative design, Pico-Pin allows for smaller diameters compared to Herbert Screws. This is a major advantage in the case of arthrodesis of smaller bones, such as the finger joint. Using ordinary screws for arthrodesis comprises the risk of harming the onychostroma up to bone fractures. Due to the diameter reduction of the head thread, risk is reduced significantly.