SecurityHigh quality automatic door locks provide extra security for doors and windows. Adding the lock once can improve the security. MaterialMade of aluminum alloy, stable and durable, not easy to rust. The special design makes the appearance different from the traditional lock and improves security. DesignThe appearance is exquisite and simple, welded and sealed, the base is thickened and reinforced, and the automatic spring integrated is not easy to break and deform, and it is strong and durable. Easy to InstallAluminum bolts, spring type rebound pull ring, easy to install. High quality door bolts can improve the security of doors and windows. Applicable SceneUsed in family bedrooms, doors, garages, gardens, bathrooms, cabinets, kitchens, offices, hotels, etc. . to save space and organize your space neatly. Product Special Gift An aluminum alloy door buckle and latch of window includes 4 screws, a total of 16 screws. Easy to Use Door window security ring an ideal tool for locking and anchoring the jig rod. It uses the resistance produced when the wedge-shaped pin of the clamp squeezes the tie rod to anchor the tie rod and operates reliably. Product Details Material: Alloy Aluminum Kind: Butterfly Bolt Size: 54*43.5mm Color: Black Package 4 * Spring Bolt Aluminum Door Latch Lock16 Free Screws Note 1: Products are measured manually and there may be an error of 2- 3 mm. 2: Cell phones and computers have different resolutions and colors may vary slightly. 3: If you have any questions about the products, please feel free to not to contact us for a message.