I wear a brown scapular and a cord rosary around my neck. They are not meant to be used like “magic charms”, but they do have the side benefit of scaring away demons, because they’re holy objects that are blessed by a Catholic Priest. The rosary also comes in handy if I stop by a Church and feel the urge to say the rosary in front of the Blessed Sacrament, or anywhere else. It’s the same reason that Catholics put a crucifix or statues of various saints in our homes. First of all, these holy objects act as a reminder of Jesus, or Mary, or angels, or the other saints, so when we see them, we’re often reminded to say a quick prayer.