The 2026 Leaf Ring Kings Bruce Buffer Auto Autograph Metal X #d 1/1 is a highly collectible trading card featuring the autograph of Bruce Buffer, a legendary boxing commentator. This one-of-a-kind card is made of metal and is serial numbered as 1/1, making it a rare and valuable piece for any sports memorabilia collector. Produced by Leaf in the United States, this unique card is a must-have for fans of boxing and sports trading cards alike.