sandar sanda
Ƙarshen ƙare biyu yawanci ana ƙirƙira su ne daga nau'ikan kayan inganci iri-iri, waɗanda aka zaɓa bisa ga buƙatun aikace-aikacen don ƙarfi, dorewa, da juriya na lalata. Carbon karfe yana daya daga cikin kayan da aka fi amfani dashi, musamman a maki kamar 4.8, 8.8, da 10.9.