Watch as this simple leather key ring develops a beautiful patina. It ages over time and will continue to darken with rich color. Consider placing your name or initials stamped in the center. You may even us this to help organize different sets of keys. Built by hand on a per order basis using U.S. Full Grain Leather. Every Leather Key Ring comes with a tin of Mr. Lentz Spiff N’ Shine, a handmade leather conditioner meant to keep high quality leather goods in high quality shape.