Guardian Angel auto rosaries are typically one-decade rosaries with a clip that is conveniently displayed in the rear view mirror of the car. The main purpose of an guardian angel auto rosary is to remind you of your Catholic faith. The bible teaches that the angels, although they are largely unseen, watch over us and work for our good. They are assigned to protect and guide us. Select a wide selection of auto guardian angel rosary here! They are a perfect gift for friends and family for safe travels but can also be for your own use as well.