Iron Fist, Iron fist or Ironfist may refer to an Iron hand prosthesis that could be set to fist position to hold cutlery, a tool or a sword; to ruthless and usually unrestricted control, as commonly exercised in authoritarian or totalitarian regimes, or to:
Military
Iron Fist (exercise), an Indian Air Force exercise held in 2013 and 2016
Iron Fist (countermeasure), an Israeli counter-weapon system

20th Armoured Brigade (United Kingdom) or The Iron Fist, a British Army armoured formation based in Paderborn, Germany
Operation Iron Fist (disambiguation)
Music
Iron Fist (album), a 1982 album by Motörhead

"Iron Fist" (song)
Iron Fist, a progenitor of the band Helloween
"Iron Fist", a song by Die Apokalyptischen Reiter from Soft & Stronger
"Iron Fist", a song by Goldfinger from Disconnection Notice
"Iron Fist", a 2013 song by Coheed and Cambria from The Afterman: Descension
Other uses
Iron Fist (character), a Marvel Comics superhero
Iron Fist (TV series), a Netflix series based on the Marvel Comics series
Iron Fist (novel), a 1998 Star Wars novel by Aaron Allston
Iron Fist, a fictional Super Star Destroyer
Tekken or Iron Fist, a series of fighting games by Namco
Dr. Ironfist or Vitali Klitschko, Ukrainian heavyweight boxer
Puerto Rican anti-crime policy or The iron fist
Brass knuckles, a weapon that inflicts more damage while punching