Saint Michael has long been known as one of the most famous angels with the ability to stomp out evil. He is often pictured as victorious over the devil himself, as he is in our oxidized modern pewter (no lead) medal.
St Michael's patronage is so broad: from artists to bankers to protection from dangers at sea and for countries around the world, including India, Mexico, Croatia, etc.
On the reverse is a Guardian Angel. So, with this medal, the wearer is doubly protected!