Mark Martin Keychains Savor the adrenaline of Race Day with officially licensed Mark Martin Keychains from the ultimate sports store! Show your Mark Martin devotion with authentic Nascar Key Chains featuring Mark Martin Lanyards, Key Ring and Nascar Keychain. Nascar fans, score your new Mark Martin Keychain from our Nascar Shop and receive your new Mark Martin Gear in time for the next big race. Go Mr. Consistency!