ESP Quick Change Uni Link, Perfect for the highly effective ‘Ronnie Rig’, the slight opening in the crook makes it easy to attach the hook and the smooth rotation provides 360-degree movement. The two different sizes can be tailored to different sized hooks and baits to create a perfectly balanced presentation. These swivels can also be used on a helicopter rig where the crook allows quick change of a looped hooklink and the large ring provides a safe set up. Matt black finish.