A Hammer is a simple tool designed to manually drive nails, brads, and other fasteners into softer materials, such as wood or drywall. A hammer has a head and a handle, or shaft. The components of the head depend on the type and use of the hammer, but most have a face that strikes the fastener behind the bell and neck, which holds the handle.
The opposite end of the head may have a forked nail-puller (called a claw hammer) or a peen (small face for driving pins or tacks). Most construction and household hammers are claw hammers with heads weighing 7, 10, 13, 16, or 20 ounces.
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