Saint Benedict was a 5th century monastic who was known as a powerful exorcist. As a pre-schism saint he is recognized by the Orthodox, Catholic, Lutheran, and Episcopal Churches. 
The Benedictine holy medal has been used by many traditions, Christian and otherwise, for protection. Saint Benedict is believed to provide protection from evil. Some of his unique attributes of protection associated with this saint are uniquely timely:
Protection from for individuals curses, evil, disease, and farm animals inflicted with plagues. 
These holy medals are each individually blessed using the unique exorcism prayer for any sacramental depicting the Benedictine symbol. You will receive the pendant, necklace chain, and a letter of authenticity. 
Every part of the Benedictine medal has a unique meaning:
The front of the Medal of Saint Benedict is stamped with a cross on which is superimposed the letters CSSML on the upright beam and NDSMD in the cross beam.

The letters stand for the Latin words Crux Sacra Sit Mihi Lux: Non Draco Sit Mihi Dux which means "May the Holy Cross be My Light: Let Not the Devil be My Guide."

The Letters CSPB in the 4 angles around the cross stand for Crux Sancti Patris Benedicti , the Latin for "Cross of the Holy Father Benedict."

Around the outer edge of the of the medal are the letters V.R.S.N.S.M.V.-- S.M.Q.L.I.V.B, which stand for the Latin Vade Retro Satana (Begone Satan) Nunquam Suade Mihi Vana (Never Suggest Vain Things to Me), Sunt Mala Quae Libas (What You Offer Me is Evil) Ipse Venena Bibas (Drink your own Poison).

At the top of the medal is stamped the Benedictine motto, "PAX" meaning "PEACE."
On the back of the medal is the figure of Benedict holding a cross and the Holy Rule book of the order of Saint Benedict. On his right is the poisoned cup (snake inside) which broke when he made the sign of the cross over it. On his left is the pet raven carrying away the loaf of poisoned bread. Inscribed above the cup and raven are the words Crux S. Patris Benedicti - meaning "Cross of Holy Father Benedict."

The outer edge of the medal bears the inscription: Eius In Orbitu Nostro Preasentia Muniamur: "May We Be Strengthened By His Presence At Our Death."