The dial is the truly aesthetic of the watch. It has to convey information clearly while looking attractive. Making a dial is incredibly complicated, necessitating numerous production techniques. Dials are made from brass. However, before the metal can be used, it has to be heated to 750°C in order to make it soft. A continuous length of brass is fed into a stamping press and subject to immense pressure, sometimes as much as 400 tonnes. Feet are fitted to the underside of the dial, allowing it to be subsequently fixed to the movement. A pressing technique, using colossal force, is used to impart various patterns to the dial surface, enhancing its visual appearance. A series of holes are made in the dial surface, which serve a variety of uses. For example, a central hole allows the canon pinion to peep through the dial and connect with the hour and minute hands.