Definitions for knuckle duster
brass knucks, knucks, brass knuckles, knuckles, knuckle duster(noun)
a small metal weapon; worn over the knuckles on the back of the hand
A weapon made of metal worn around the knuckles that strengthens the impact of a punch; brass knuckles.
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"knuckle duster." Definitions.net. STANDS4 LLC, 2013. Web. 24 May 2013. <http://www.definitions.net/definition/knuckle duster>.