Did you know that of the 3 billion base pairs in the human genome, only 0.1% are unique to you? So, rock your 0.1% and show off how extraordinary you are. Our DNA (Deoxyribonucleic acid) Keychain is 100% unique. Cast out of pewter, it shows off a beautiful double-helix design. But instead of H-bonds, this DNA strand is held together by your office keys, car keys or lab keys!