The Greatest of these is love. 1 Corinthians 13:13. This powerful verse has been elegantly debossed in gold lettering on the back of this Mr and Mrs. keyring set. This set of keyrings is part of the Mr & Mrs Collection, and has been constructed with a man-made material called LuxLeather that has the look, feel and durability of real leather. Elegant stitching around the outside of the keyrings gives it a finished look.