John came out to our office and upgrade the locks on couple doors by installing X4 Maxum Deadbolt high-security locks. John is a very experienced and knowledgeable locksmith and while he was working he patiently explained the differences between the locks. He completed the job within an hour and cleaned up afterwards. We felt confident in his work and would absolutely call him for our commercial access control project, thank you so much John it was a real pleasure to do business with you!