Ko te hammer hammer he wahanga kua whakamahia ki te kuru hama.Ko tana mahi tuatahi ko te whakaiti i te wiri me te kakahu, engari ano hoki te mahi o te muffler, i roto i te mahi o te kuru hama, he mahi kaore e whakahaweatia.Hei aukati i te hama kuru i roto i te mahi o te wiri nui me te haruru, kia pai ake ai te mahi o te hama kuru, ko te kuru hammer ruuma poraka he waahanga tino nui ka taea te mahi tahi me te mahi o te hama kuru ki oti pai.