Since my son's life depended on it I couldn't wait around for anyone to install this for me. Good thing I'm pretty handy with a cordless drill. A Do It Herself project!
The package included screws and crappy directions. But in less than five minutes, with only my drill and one mistake, I had this:
With hinge-locks properly installed on our front and garage doors, my family is now safely locked it. Oh, and I hear they're good for security purposes too. If only that were my main concern.