Duba wurin da ke ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar yadda wurin yake:  Passage: Bisa ga ɗan gajeren labari na Richard Matheson na 1956 mai suna "Steel". Dan Gilroy ne ya rubuta ainihin rubutun kuma DreamWorks ya saya shi $ 850,000 a 2003 ko 2005 (tushen ya bambanta). Wannan aikin yana daya daga cikin 17 da DreamWorks ya dauka daga Paramount Pictures lokacin da suka rabu a shekara ta 2008. Daraktan Peter Berg ya nuna sha'awar aikin a tsakiyar 2009 amma bai ci gaba ba. An haɗa Levy da aikin a watan Satumbar 2009, kuma an jefa Jackman a cikin rawar da ya taka a watan Nuwamba don kuɗin dala miliyan 9. A cikin wannan watan, Steven Spielberg da Stacey Snider a DreamWorks sun ba da haske ga aikin. Les Bohem da Jeremy Leven sun yi aiki a kan rubutun Gilroy, amma a cikin 2009 John Gatins yana aiki a kan sabon daftarin. Lokacin da Levy ya shiga aikin, ya yi aiki tare da Gatins don sake duba rubutun, yana ciyar da makonni shida yana daidaita rubutun. Kamfanin tallatawa FIVE33 ya yi shafi ɗari biyu "Littafi Mai Tsarki" game da dambe na mutum-mutumi. Levy ya ce Spielberg da Snider sun gayyace shi yayin kammala Ranar Ranar Ranar, kuma yayin da darektan ya fara la'akari da Real Karfe don samun "ra'ayin mahaukaci", ya yarda bayan karanta rubutun kuma yana jin cewa zai iya zama "wasan kwaikwayo na wasanni na gaske". Levy ya zaɓi ya sanya fim ɗin a cikin bukukuwa na jihohi da sauran saitunan "tsofaffi" na Americana waɗanda za su nuna rashin tausayi kuma su haifar da sautin dumi ga labarin mahaifin-ɗan fim ɗin. Akwai kuma wani yunƙuri don shimfidar wuri don haɗuwa da sabon da tsohuwar fasaha. An fara yin fim a watan Yunin 2010, kuma ya ƙare a ranar 15 ga Oktoba, 2010. Wuraren sun hada da yankunan da ke kewaye da Detroit, Michigan, da kuma fadin jihar, ciki har da Cibiyar Renaissance, da Cobo Arena, da hedkwatar Detroit Fire Department, da Russell Industrial Center, da Ingham County Courthouse a Mason, Michigan, da Leslie Michigan Railroad Depot, da tsohon Belle Isle Zoo, da kuma Highland Park Ford Plant. Jason Matthews na Legacy Effects, magajin Stan Winston Studios, an hayar da shi don juya zane-zanen robot Tom Meyer a cikin kayan aiki mai amfani. Ya ce, "Mu...  Tambaya: Menene Matheson ya rubuta a tsakiyar shekarun 50?
Karfe