MaterialOur door latches and locks are made of solid 304 stainless steel with brushed surface, solid structure, beautiful appearance, anti-rust and corrosion resistant, sturdy and durable and long service life. Sturdy and reliable enough for daily living room use Easy Installation Easy to assemble, equipped with stainless steel screws and surface knobs for a stable connection. The screws are made of stainless steel, providing extra strength allowing them to securely engage and engage, thus remaining stationary HIDDEN DESIGNMounts flush to the door, no bolts or mechanical part is visible. Machined to the edge of the door, it is completely hidden when the door is in the closed position. This concealed style is easy to use and fits your modern decor, making it ideal for use in tight spaces where the head must be flush or below the surface. [Scope of application ] Suitable for normal traffic household security doors, and also suitable for various wooden doors and windows. The integrated anti-theft alarm is made of high quality aluminum, very thick and suitable for all types of wooden doors and windows. Anti-theft protection. Easy to use, suitable for interior doors and ideal for all types of wooden doors Size: As shown in the picture, Note: The data are all manually measured, please allow 1-3 error cm Due to the difference in light and display, there may be some color difference, please refer to the actual item received. Easy to install.