Marvel Endgame Captain America "I Knew It" 3D Cufflinks If you're a fan of Avengers: Endgame, then you'll know who speaks this classic line and why. Celebrate the moment again and again with this pairing of Thor's Mjolnir hammer and Captain America's shield cufflinks, both expertly crafted in 3D. The only question is: are you worthy enough to wear them? Officially licensed by Marvel. Item cannot be shipped to P.O. Boxes