Points I would like to make that were not in the video: The whole point of the demonstration is so that people are aware of how easily safety can be upgraded by locking the lock on the INSIDE of the gate instead of the outside. Most crimes of the break in or robbery type are committed upon opportunity - if there isn't an easy opportunity then the crime most likely wont happen. There are MANY MANY other ways to break/pick/cut a lock. *Minimizing weaknesses and removing ease are the first steps to increasing safety.* A 1/4 inch shackle is twice as weak as a 3/8 shackle however the amount of available mechanical leverage from a simple setup like what I showed will still be able to snap even the beefiest locks without protected shackles.