Medieval thimbles were either cast brass or made from hammered sheet. Red hot wrought iron could be hammered into shapes. Then, wooden wedges were hammered into the holes. The Rings were originally hammered manually with a rough outer surface. Copper was hammered until it became brittle, then heated so it could be worked further. Sheets of metal would be hammered to thickness and then soldered together. Then they hammered in wooden beams and flushed them with water to force them out. Literally "hammered", a strongly accented effect produced by releasing each bowstroke forcefully and suddenly. Viewers hammered a nail into a wooden board, creating the art piece. They were fitted using hydraulic machines or were hammered in by hand. In the climax to the entr'acte this rhythm is hammered out on eighteen anvils. Versions of the hammered dulcimer are used throughout the world. After much negotiation, a constitution was hammered out with some minor changes. Silver is hammered cold (at room temperature). Then, a single stake was to be hammered through them.