This video provides the installation instructions for the Schlage ND Lock, and includes: 2:14 - measuring and drilling the two through bolts 4:20 - installing the lock 6:06 - timing the key cam 8:22 - testing the lock operation The video features the ND80 model lock, but the steps to prep the door, install the lock, and time the key cam can be followed for many other Schlage lock functions. Video from Relcross