Note: This product is a set of combination products that cannot be dismantled for use, please remove all your old pieces and adopt all our parts for the proper operation Case Lock: Strong, durable, fire resistant, corrosion resistant, forced physical protection against input and providing 3 error -coded locking mode with solenoid locked and 2 invalid switches high -grade zinc alloy -resistant key set Standard Size: 95 mm (3.74 inches) round front panel, weight 6,35 ounces, please remember to check the size to comply with your box box before purchasing, please refer to our product instructions video. Easy Use and Installation: It opens with 3-8 digital code and 3 different color lights showing different situations. To replace the battery, press the tab in the counterclockwise and remove the keypad face Application: Digital keypad security solenoid lock changes are suitable for home crates and lock boxes, pistol s, hotel crates, cabinet crates, nest s Service: If you are not a cashier technician or a professional locksmith, please do not try the installation. If you encounter any problems or difficulties, please us and we will provide one -on -one to help you solve your problem.