These innovative fins clip in and out without needing a key. We stock a huge range of FCS II fins for you to browse. Whatever set-up you are looking for five fin, Quad, Thruster, Twin or Single we have a great selection for you to choose from in a variety of the best brands including FCS, Gorilla and more. Need advice? Drop us a line, With years of expertise we are confident that we can help. Shop now for free UK delivery and returns* here at magicseaweed.