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 consists of a handle and a head, which is struck against a sound block to produce a sharp sound. The gavel symbolizes authority and is often associated with the legal system and formal meetings. In courtrooms, the gavel helps maintain decorum and indicates when a decision has been made. It is also commonly seen in auctions, where it signifies the acceptance of a bid. The use of a gavel is a longstanding tradition in various legal and formal settings, including those involving judges, auctions, and parliaments.