STURDY AND DURABLE: the box is made of high strength zinc alloy and heavy-duty stainless-steel material, well-made and sturdy enough to withstand hammering, resist crushing, sawing, and prying. And the ABS shell can effectively prevent rain, dust, Snow, sun protection, and repeated use for a long time SAFE AND SECURE FOR YOUR KEYS: The 4-digit code allows you to set your own combo code with 10000 unique choices, which ensures security and your key's safe in our lockbox. MAKE SURE TO RECORD YOUR PASSWORD BY TAKING A PHOTO OR NOTE AFTER EVERY TIME RESET THE PASSWORD, OTHERWISE, YOU HAVE NO WAY TO GET IT BACK; EASY TO INSTALL: The package comes with all necessary mounting hardware, It is tightly sealed and waterproof, durable enough for the house key and outside key storage LARGE CAPACITY: The portable key security gym locker box provides large internal space for holding up to 5 house keys [shorter than 3.35 inches]; When you're traveling or out for business, you can put your house keys, car keys or access cards in; LARGE CAPACITY: The portable key security gym locker box provides large internal space for holding up to 5 house keys [shorter than 3.35 inches]; When you're traveling or out for business, you can put your house keys, car keys or access cards in