P-Line Rolling Corkscrew Swivel - The tool you should carry in your tackle box. The Corkscrew Swivel Has no open and closed mechanism No more metal fatigue. Change fishing lures easily without any tool such as pliers. Quick and easy leader and rig changes without tying Line twisted problem decreases Lure Action more realistic and helps you cast more efficiently. Size 3/0 - 47mm, 110kg/242lbs Size 4/0 - 51mm, 125kg/275lbs Size 6/0 - 57mm, 140kg/308lbs