This piece benefits not only you but those around you. First and foremost, this piece reaches into heaven and calls upon angelic protectors to come to Earth and watch over your life. This isn't a big deal, as God has an infinite amount of energy and magic. These angels will be created specifically for you and will protect yu to the fullest, keeping out anything that isn't divine and holy.
However, this piece goes a step further. When wearing this piece you can transfer this power to somebody else, with or without them knowing it. All you have to do is touch them. They will become part of a group of humans who are known as the "marked". God creates angels specifically for those who are deemed as part of the marked. As such, when you lay your hands on another person, thereby "marking" them. They will be sent angels of protection as well.