Ga waɗanda sababbi ne a wannan filin, ƙwanƙwasa ƙwanƙwasa ba shakka ba su da masaniya. Kayan sun hada da bakin karfe, carbon karfe, jan karfe, da aluminum. Kan gaba daya yana da lebur ( madauwari ko hexagonal, da dai sauransu), sandar tana da zaren gaba daya, sannan akwai hakoran furanni a gefen kasan kai, wadanda za su iya taka rawa wajen hana sassautawa.