Swivel Tees support a trapped swivel at exactly the right angle for proper operation. Reduces the likelihood of tangling. Helps the swivel to rotate smoothly under load.Swivel Tees come complete with matching top quality swivels. Thread the assembly on to the line, then lock into position with Coil Crimps. The whole unit is free to rotate on the line thus further reducing the risk of tangles during the cast and when the rig is on the seabed.