Claw hammer
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A claw hammer is used by carpenters and other trades, mainly to nail or to remove nails from wood. It has one flat face for hammering nails into wood, with the second having two claws, or a single claw with a vee shaped slot in it. The hammer claw is placed over a partially inserted nail, which fits into the vee slot. The outer face of the claw is often curved; the handle of the hammer is used as a lever to 'roll' the head along this curved face and pull the nail out of the wood.
A framing hammer is a large claw hammer used in framing carpentry.
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