Hammer - Wikipedia
This article is about the tool. For other uses, see Hammer (disambiguation) . A modern claw hammer A hammer is a tool consisting of a weighted "head" fixed to a long handle that is swung to deliver an impact to a small area of an object. This can be, for example, to drive nails into wood, to shape metal (as with a forge), or to crush rock . Hammers are used for a wide range of driving ...
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