I already used Pre-Lock for my home alarm, and had them back to my house for additional upgrades do to a recent home invasion. I made the mistake of hiring someone to replace my front door lock and found them on google, and trusted that they were selling me a real Mul-T-Lock Deadbolt which are made in Israel and that is what I wanted. They sold me a Dorex lock with a Uscan Cylinder and tricked me. Pre-Lock pointed that out and replaced my locks with real Mul-T-Lock Product, and made my front door entry real secure. I want everyone to understand the dangers of going to Google and hiring someone who may not really be a locksmith professional. I also called and spoke with the President of Mul-T-Lock who assured me that Pre-Lock is a excellent choice and a true authorized Mul-T-Lock Dealer.