The Aquateko IN3572C 35-Pound Invisa Swivel is a clear fishing swivel and is invisible under water. Invisa Swivel is its ability to self lubricate due to the space age material they are made of. These swivels will also protect your guides from nicks. Invisa Swivels can be bent hundreds of times and show no signs of fatigue or memory. Invisa Swivels are not effected by salt or fresh water so corrosion is not even a issue. SKU : ADIB002UEIU56.