Looking for door or window locks? Don't trust your security to the DIY locks you find in big box stores. Take advantage of our experience and personal recommendations, and benefit from the advice of a professional for your security. Feel safer knowing that your locks are high quality, and installed correctly. Hartford Safe & Lock is proud to recommend and install Mul-T-Lock High Security locks. Recognized in the industry for their high security, Mul-T-Lock locks have long been the standard against which all other high security door locks are measured. Of course, the best lock will only work when it is properly installed. Our expertise in selecting the proper door or window locks for your home or business, and then installing them correctly, will ensure that you really take full advantage of the security these high quality locks provide.