【Premium Steel Construction】Made of steel for strength and long lasting durability, ensuring superior durability through frequent use and long-term storage 【Enhanced Security Function】The special shape combined with steel material can not only extend the service life, but also effectively prevent unauthorized access, protect the elevator equipment and passengers 【MULTIPLE SIZE OPTIONS】To meet the needs of the elevator door, there are three practical lengths(10cm/20cm/30cm), users can choose the best model for their specific application 【Extended Design】Features an elongated shaft that increases flexibility and convenience when operating at different heights, making it ideal for a variety of work environments and space requirements 【ELEVATOR SPECIFIC COMPATIBILITY】Precisely designed triangular shape perfectly fits various elevator door locks for smooth operation without obstruction, ensuring both commercial and residential environments, Manufacturer: Pffiocix