【Elevator Specific Compatibility】Precisely designed triangular perfectly fit various elevator door locks for smooth operations without jamming, ensuring both and convenience in commercial / residential settings 【Extended Design】Features an elongated shaft that provides enhanced flexibility and convenience when operating at various heights, making it ideal for different working environments and space requirements 【Enhanced Security Features】The special shape combined with steel materials not only extends product lifespans but also effectively prevents unauthorized access, protecting elevator equipment and passenger 【Premium Steel Construction】Crafted from steel for strength and long lasting durability, ensuring good even with frequent use or extended storage periods 【Multiple Size Options】Available in three practical lengths ( 10cm / 20cm / 30cm) to accommodate elevator door needs, allowing users to select the most suitable model for specific applications, Manufacturer: Tsophreniq