Window Covering

Where can I find the metal door and window covers that secure construction sites?

I'm in Philadelphia and I work on several row-homes. I have seen these security covers that people are placing on their construction jobs. They are great, they completely cover the door and windows and they are metal - no way to break them and no way to get in. Any ideas who makes them or when I can get them?

Public Comments

1. http://www.vacantpropertysecurity.com/