Karfe mai ƙarfi, daidaici mai tsayi, tsawon rayuwar sabis, da dai sauransu. A cikin aikin sarrafa zaren, ana magance matsalar sauƙaƙan asarar kayan tsutsotsi da tsutsa, sannan ƙarar da ke haifar da gogayya na kayan tsutsotsi da tsutsa kuma yana raguwa. Canjin mitar mara mataki, daidaitawa kyauta, mai sauƙin amfani.