【Material】Our door latches and locks are made of solid 304 stainless steel with brushed surface, solid structure, beautiful appearance, rust and corrosion resistant, sturdy and durable, and have a long service life. Sturdy and reliable enough for daily use in the living room 【Easy Installation】Easy to assemble, equipped with stainless steel screws and surface knobs for a stable connection. The screws are made of stainless steel for extra strength, allowing them to securely lock and engage, thus remaining stationary. 【HIDDEN DESIGN】Mounts flush to the door, no screws or mechanical parts are visible. It is installed on the edge of the door and is completely hidden when the door is closed. This concealed style is easy to use and will match your modern decor, making it ideal for use in tight spaces where the head needs to be flush or below the surface. [Scope of application] Suitable for household security with normal traffic doors and also suitable for various wooden doors and windows.