PATENTED: Multiple USA & International patents The Quick Door Hanger is a patented door installation system. This fail proof bracket system allows for quick and no hassle door installation for beginners to pros. Whether you are a beginner or a pro, this is simply the easiest and fastest way of hanging professional doors that are perfectly plumb and have a perfect reveal. Using this quick, fail-proof system, doors can be installed accurately in as little as 5 minutes without the hard work of shimming. No shimming and zero nailing through the door jamb. Each pack contains 60 brackets, which is enough for 10 complete interior prehung door installations, all screws included.