ESP Quick Change Swivels 10 per packet. These Quick Change Swivels are size 9, are extra strong and have a smooth matt black finish. They fit perfectly into the ESP lead clips and the crook allows you to quickly change looped hooklinks. For an efficient anti-tangle set up, quick change swivels are best used with and ESP Streamliner Rig Boom. This also tends to push the hooklink away from the lead.