Dunƙule
Ana yin ƙwanƙwasa zare da yawa daga kayan inganci daban-daban, waɗanda aka zaɓa bisa takamaiman buƙatun aikace-aikace daban-daban dangane da ƙarfi, karko, da juriya na lalata. Carbon karfe yana tsaye a matsayin ɗayan kayan da ya fi dacewa, musamman a cikin maki kamar 4.8, 8.8, da 10.9.