Black St. Benedict Oval Hematite Rosary. Material: Hematite 5 X 7″ Oval Bead Size: 20″ L, 1 1⁄2″ Crucifix. Lay Catholics Are Not Permitted to Perform Exorcisms but They Can Use the Saint Benedict Medal, Holy Water, the Crucifix, and Other Sacramentals to Ward Off Evil.