Combination padlock and key storage lock box all in one, very easy to use both functions. When you unlock it, please pull out the shackle first, then open the lock box. The opposite when you lock the lock box. Material: This key lock box is made of zinc alloy and heavy-duty steel, which can protect the box from hammering, sawing or prying. Also, it is environmentally friendly paint, so it isn't harmful to the body. High Security: This product is an adjustable combinations lock with 4 dials. It can offer 10000 combination. Easy Operation: It is easy to install and use it. You can set your favorite numbers as your passwords. The 4-digit combination is easy to remember and reset. Wide Application: The key box can be used in many areas. It is suitable for outdoor use. It can be fixed to a wall for emergency entry, vacation home, pet sitters ,etc.