1. Irin alagbara, irin ni awọn abuda kan ti ṣiṣu nla, toughness giga, ati agbara gbona giga, ati pe o ni itara pataki lati ṣiṣẹ lile, eyiti o nilo didara ti o ga julọ ti awọn abẹfẹlẹ band.2. Awọn abẹfẹlẹ ri yẹ ki o ni dara ooru resistance ati ki o ga yiya resistance. Arinrin bimetallic band ri abe ti a lo fun sawing erogba, irin ohun elo ni o wa ko dara fun processing idoti