Security High-quality automatic door locks provide extra security for doors and windows. Adding the lock once can improve security. Material Made of aluminum alloy, stable and durable, not easy to rust. The special design makes the appearance different from the traditional lock and improves security. Design The appearance is exquisite and simple, welded and sealed, the base is thickened and reinforced, and the built-in automatic spring n It is not easy to break and deform, and it is strong and durable. Easy to install Aluminum bolts, spring-type rebound pull ring, easy to install. High-quality door bolts can improve the security of doors and windows. Applicable scene Used in family rooms, doors, garages, gardens, bathrooms, cabinets, kitchens, offices, hotels, etc. to save space and organize your space neatly. Special gift Aluminum alloy door and window lock buckle contains 4 screws, a total of 16 screws. Easy to use Door window security ring an ideal tool for locking and anchoring the jig bar. It uses the resistance produced when the clamp's wedge-shaped pin clamps the tie rod to anchor the tie rod and works reliably. Product information Material: Aluminum alloy Type: Butterfly bolt Size: 57*43.7mm Color: Black Package? 4 * Spring Bolt Aluminum Door Lock (16 free screws)