Enhanced Security: This re-codeable combination lock adds a 4-digit code to a standard deadbolt lock, allowing you to set up to 10,000 codes, greatly improving your security and privacy. The default code is 0-0-0-0, eliminating the need for keys and the risk of losing them. Durable: Made of high-quality zinc alloy, this deadbolt lock features a 10mm diameter solid steel bolt and a waterproof coating that protects it from rust and weathering, improving its wear resistance and strength, ensuring increased burglary resistance and durability. The handle is also made of solid steel, making it less likely to break or loosen. Two Installation Methods: Our sliding deadbolt lock installs in two methods: vertical and horizontal. The kit includes a cover for horizontal installation and a metal side catch for vertical installation. (Note: The deadbolt must be aligned with the cover or side catch.) Easy Installation: Includes six tamper-proof screws. Use a power screwdriver or drill to fix the sliding deadbolt to the door frame and tighten the screws after aligning the lock cover. Installation only takes a few minutes: quick and easy. (Note: Once installed, the one-way screws cannot be removed. Be sure to confirm the installation location beforehand!) [Suitable for indoor and outdoor use]. This combination lock measures 100 x 48 x 32 mm and is easy to install, fitting even in the tightest spaces. It is suitable for a variety of environments, including school or home lockers, garden sheds, closets, storage rooms, garden gates, farmhouses, wardrobes, wine cellars, and anywhere security and privacy are important.