A gavel is a small hammer-like tool used by judges and auctioneers to signal the start or end of a proceeding or to call for order. Typically made of wood, it has a handle and a rounded head. The sound it makes when struck on a surface is meant to capture attention and signify authority. In a courtroom setting, the gavel symbolizes the power of the judge, often associated with the legal system and justice. It is also used in meetings and auctions to indicate decisions or finalize bids, making it a versatile tool in various formal contexts.