Top 10 Best Key Lock Boxes Review 2018 (September. 2018) The value of having a perfect key lock box for your security purposes can never be ignored. Any person will be able to understand how good quality key boxes will be ideal in so many areas. Because we care about you and know that investing in a good key lock will improve on the security issues, we have given you a list of the best key lock that will guarantee you excellent results. We now believe that with this help you will be able to avoid the low quality and poorly constructed key locks and make the right choice. 10. By: Master Lock Key Lock Boxes This is a good product that you should consider having since it is built in that it has a convenient push button that purposely acts as the locking mechanism .this master lockbox is of wall mount design and you are able to set your own combinations that will be up to 12 characters to avoid easy guessing by any person. The large internal cavity of the master lockbox is built to accommodate or hold multiple keys and access cards. 9. 8. 7. 6. 5.