A single brass-bodied instrument that switches between black ink, red ink, and a 0.5 mm mechanical pencil lead. It uses the same hexagonal barrel as rOtring's drafting tools, finished in silver and milled from brass. Two D1 ballpoint refills and one 0.5 mm lead tube sit inside, changed by the twist mechanism at the tip. The lead advances mechanically; there is no retract function. Standard D1 refills keep it serviceable, but the multi-tip arrangement makes it thicker than a dedicated pen.