【Increased Security】This recodeable combination lock adds a 4-digit combination to ordinary door deadbolt locks, allowing you to set up to 10,000 possible passwords, greatly improving your security and privacy. The default password is 0-0-0-0, no key is needed, you don't have to worry about losing the key. 【Strong and Durable】The door lock is made of high-quality zinc alloy. Solid steel latch with a diameter of 10 mm and a waterproof coating that protects the lock from rust and weather, improves wear resistance and hardness, and ensures burglar resistance and durability. The handle is also made of solid steel, which is not easy to break and does not come off easily. 【2 Installation Methods】Our combination slide bolt lock supports 2 installation methods, vertical and horizontal. The slide bolt lock set comes with a lock cover for horizontal use and a metal side door buckle for vertical use (Note: the bolt must be aligned with the lock cover or door buckle) [Easy to install]. 】Six