Features: 1) Steel strap will be rusty after exposed in air and the rust will be penetrate goods. PET strap is not rusty forever, fine looking and favorable of protecting environment 2) Needn't steel locks, no trace and scrape, and small cost 3) PET strap will not scrape the goods inside packing without knife-edged hem and will not hurt labor. Even if fastened tightly, it will not hurt the working labor as be snipped 4) Packing with better tightening. After long distance transportation, PET strap will keep the fine tightening 5) Safeguard your goods by the features - nice ductibility, resisting- strike and difficult to break.