WIDE APPLICATION: -The safe with number code is suitable for storing keys,bank cards,etc.It can be fixed on the wall for home,warehouse,vacation home or any other place may need it.You can give spare keys to your friends,family,neighbors and caregivers.With this 4 Digit Lockable Key Safe,you don't have to worry about the keys you've hidden under the carpet being taken away. . HIGH SECURITY: -The exterior of the key safe is made of high-quality aluminum alloy casing and heavy-duty steel locking mechanism,which provides the wall-mount key safe with extra resistance against hammering or drilling attacks.The weatherproof metal material can ensure the safety of your keys and cards. . 4-DIGIT COMBINATION: -uses a 4-digit multiple combination to ensure robust protection.The 4-dial garage number code offers up to 10,000 different combinations,far more than 3-dial models,much more difficult to crack.It's easy to reset the combination you want at any time,making your valuables more secure.(A notice: Take a picture / write it down to save your code!) . MINI SIZE EASY TO USE: -Outside size (H x W x D): 3.7 x 3.1 x 1.4 inch,inner size (H x W x D): 3.2 x 2.7 x 0.9 inches.The palm sized key safe box with combination lock outside can store spare keys,perfect for daily activities,friends,relatives,housekeeping,pet sitter,real estate business and Airbnb rentals,etc. .