From the Greater Key of Solomon: “This commandeth the Spirits of Mercury, and serveth to open doors in whatever way they may be closed, and nothing it may encounter can resist it.”

Reverse side is the Third Pentacle of Mercury: “This and the following serve to invoke the Spirits subject unto Mercury; and especially those who are written in this Pentacle.”

Engraved and consecrated on a Wednesday in the hour of Mercury and made of 18g nickel silver (a zinc alloy).