noun
EXAMPLES FROM CORPUS
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Before it was over, knuckle-dusters had been used and two of the combatants were taken to hospital.
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He employed it with the subtlety of a knuckle-duster .
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I then noticed one of them putting on to his fingers ... a knuckle-duster .
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There was still room on his desk for Dryden and Pope beside his knuckle-duster .
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They claimed to have the weapon purely for self-defence but also had a set of viciously spiked knuckle-dusters.