A Hammer is a simple force amplifier that works by converting mechanical work into kinetic energy and back. It is a simple tool designed to manually drive nails, brads, and other fasteners into softer materials, such as wood or drywall. It is a hand tool consisting of a solid head set crosswise on a handle and used for pounding. Hammer is used to beat or striking blows on jobs or metals or jobs driving nails etc. It is used to straighten or bend a job made of metal. 

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