This economical swivel is ideal for attaching your main line to leader, for reducing line twist, or if you make your own wire traces, for rigging at the end/s. The black colour reduces light reflection, reducing swivel-attacks from toothy fish. A snap-swivel is also available so you can be ready to change lures or leader set-ups quickly. They combine a black rolling swivel and a hook-and-ring style connection for the snap wire to lock into itself.