[Recordable & Keyless Security] With our 4-wheel recordable combination lock, you can choose your favorite code from 10,000 different combinations. And the Code can be called softly. Security comes from the ease of configuration and Combination Code Reset without any hassle. You don't need to bring a lot of keys and change the lock because it uses a digital encryption method. [waterproof and durable zinc alloy material] the bolt code lock is made of zinc alloy, durable, weatherproof all year round, the body has a rust-proof coating, so it is waterproof, the barrel screw dial is chrome plated. The sliding combination lock is fitted with an anti-pick dial, a 10mm diameter solid steel sliding bolt and one-way security screws. [2 installation methods] ① lock sleeve installation: when the door frame and the door frame are on the same plane, the metal sleeve + bolt installation method is used. Side door installation: When the door frame and the door frame are at 90° right angles, with the side door ring + bolt installation method, the door frame should be opened through the hole. [Easy to Use] Regarding unlocking, you can dial the Code and pull the handle up to open the Door Lock Code. After the lock is closed, you can dial the Code, move the handle down, insert the pin into the keyhole, then dial the Code, hangar lock. Once unlocked, be sure to enter your password in time to avoid accidental locking. [widely used] the size is 80*100*48mm, the combination door code bolt is easy to install and install in the most compact space. Protect your sheds, barns, cabinets, doors, iron gates, wooden doors, fences or windows. It is the perfect locking choice for indoor and outdoor environments.