Recodeable & Keyless SecurityWith our 4-wheel recodable combination lock bolt, you can choose your favorite code from 10,000 different combinations. And the code can be called smoothly. Security comes with the ease of setting and resetting your combination code without any hassle. You don't need to bring a lot of keys and replace locks as it uses a digital password method. Waterproof and durable zinc alloy materialThe bolt code lock is made of alloy of zinc and it is durable and weather resistant all year round, the body has a rust resistant coating so that it is waterproof and the barrel bolt dials are chrome plated. The combination slide lock comes complete with pick resistant dials, 10mm diameter solid steel slide bolt and one-way security screws. 2 Installation MethodsLock Sleeve Installation: When the door frame and door are on the same plane, metal sleeve + bolt installation method is adopted. Side door installation: When the door frame and the door are at a right angle of 90, the side door buckle + bolt installation method is used, and the door frame should be opened by a hole. Easy to useAs compatible with the unlock, you can dial the password and pull the handle up to open the door lock code. And the lock closing, you can dial the passward, move the handle down, insert the pin into the keyhole, then dial the password, the shed lock is locked. After unlocking, be sure to dial the password in time to avoid accidental locking. Wide ApplicationWith dimensions of 4.76 x 1.81 x 1.57 inches, the code bolt of Combination door is easy to install and mount in the most compact space. From protecting your sheds, barns, cabinets, doors, iron gates, wooden gates, fences or windows. It is the perfect locking choice compatible with indoor and outdoor environments.