I bought it online a new state of the art Schlage keypad lever lock at Amazon and needed a professional installation. Dean from Baltimore Door & Lock was very easy to deal with and he came right away and did a great job installing it on my new office front do, he made all the necessary adjustments and went above and beyond to make sure I was happy, excellent service and such a great price, I am very happy with the results and would definitely recommend this guy to anyone I know.