Materials Crafted from robust copper and stainless steel, this lock delivers durable, longlasting performance and secure operation. Easy to Use A singlesided lock with a thickened antitheft mechanism for reliable protection. Lock and unlock easily with a key or via the internal rotary button for quick, convenient access. Quick Installation Designed for straightforward setup with no complicated steps. This internal lock can be installed quickly, even by nonprofessionals. Applications Ideal for homes, hotels, and offices. Enhances safety and privacy in interior doors and access points where secure, simple operation is required. Why it matters Strong antitheft mechanism provides improved security over standard singlesided locks. Dual operation (key or internal rotary button) offers flexible, convenient use. Durable copper and stainless steel construction supports reliable performance over time. Easy installation makes it suitable for DIY projects and quick upgrades in various settings. Use scenarios Home interior doors: add a reliable privacy and security option for bedrooms, storage rooms, or home offices. Hotel rooms: provide guests with simple, trusted privacy control for interior doors. Office environments: secure confidential spaces, storage rooms, or meeting room entrances with an easytouse interior lock.