Cheap work is workthless. Some customers spend all day calling 20 locksmiths; trying to get the lowest price. I've seen this happen. They call so many companies that they loose track. Well cheap work never lasts. Here is a small example. This little device can cost up to 68.00. Just for the parts,  does not include labor. It requires very precise measurements to install these properly. It is a required component for commercial doors which have a key cylinder on the inside. This is what happens when it is installed improperly.

  This is where it was installed. These hole patterns are nowhere near what are clearly indicated in the installation instructions for this device. Completely wrong. So I ask. Did this customer save any money by being so cheap when this was originally done? Hardly. Their door actually stopped working as a result of that little piece of plastic. You know, I hate to lecture, but I will. It is not worth the headaches, or actual cost, being cheap. If you have the money, pay to have stuff done right. Don't be a cheap person. It is unbecoming and just not very wise. All that happens is something simple turns into a nightmare. Don't be that person. :) 

Need a good commercial locksmith in Houston Texas? Call Master Locksmith Company 713 256 8796. Ask for Mike