Made of metal. Licensed Product. Old Bay Crab Claw bottle opener keychain. 5 inches from top to bottom. Perfect for the seafood lover!. This awesome bottle opener keychain is perfect for the old bay lover! What goes better with your old bay seasoned crabs than a nice, refreshing, ice cold beer? And what better way to celebrate this pairing made in heaven, than to come prepared with your very own Old Bay bottle opener keychain?! The keychain is made of metal and measures 5 inches from top to bottom.