ESP Uni-Link Standard Swivel size 9 Packets of 10. ESP Uni-Link Swivel STANDARD (Black) provide a universal hinge and 360 degree movement to otherwise rigid hook links and are ideal for stiff mono rigs in coated braid. They also improve the presentation of lighter, more flexible mono and soft braided hook links, effectively reducing tangles on the cast. Available in sizes 9, 10 and 11 to fit all popular safety clips and in-line leads.