【Enhanced Security】This re-codeable combination lock adds a 4-digit combination to your regular door locks, allowing you to set up to 10,000 possible passwords, greatly improving security and privacy. The default password is 0-0-0-0, no key needed, no worry about losing it. 【Sturdy and Durable】The door lock is made of high-quality zinc alloy, solid steel bolt, diameter 10mm, and coated with waterproof coating, which protects the lock from rust and weather, improves wear resistance, hardness, and ensures burglar resistance and durability. The handle is also made of solid steel, which is not easy to break or loosen easily. 【2 Installation Methods】Our combination sliding bolt lock supports 2 installation methods, vertical and horizontal. The sliding bolt lock kit comes with a lock cover for horizontal use and a metal side door buckle for vertical use. (Note: The lock needs to be aligned with the lock cover or side door buckle.) 【Easy to Install】Comes with 6 tamper-proof screws, the