4 DIGITS SECURE COMBINATION - With 10,000 possible combinations, our lock has high security and is extremely difficult to crack. The reset mechanism makes it easy to customize your password at any time. REMOVABLE LOCKING SHACKLE - Easily install the key lock box on your door or wall with screws. The removable shackle offers two installation options, providing maximum flexibility to meet your needs. DURABLE ALUMINUM ALLOY SHELL The sturdy and durable shell protects the security box from hammering, sawing or levering, keeping your keys safe and secure. WEATHERPROOF & CORROSION RESISTANT The weatherproof lock box is rust-proof and corrosion resistant, ensuring a long service life. Suitable for home and office use. VERSATILE USES - This portable lock box is ideal for the entrance to your apartment, garage, rental house, warehouse, or for storing keys for your Airbnb, realtors, cleaners, pet sitters and more. No need to hide keys under carpets or flower pots.