knuckle-duster

[nuhk-uh l-duhs-ter] /ˈnʌk əlˌdʌs tər/
noun
Origin
1855-60, Americanism
British Dictionary definitions for knuckle-dusters

knuckle-duster

noun
1.
(often pl) a metal bar fitted over the knuckles, often with holes for the fingers, for inflicting injury by a blow with the fist
Slang definitions & phrases for knuckle-dusters

knuckle-dusters

noun

Brass knuckles (1858+)