Multi-function implements The pencil is ideal for sketches and notes, but for a signature one needs a ball pen. The Twice multi-functional writing implement combines the two, converting from one to the other with a twist of the grip piece. It is available in a choice of brown or black pearwood, or gleaming chrome, with a non-smudging eraser under the end cap. The Trio goes one better: the slender chrome barrel conceals a propelling pencil, ball pen, and IT stylus.