Sufix Windon Leader 100lb., Sufix Wind-On big game fishing leaders leaders are the choice of tournament anglers. These windon leaders attach to the mainline in seconds without knots or swivels. They allow the leader to wind-on the reel through the rod guides. This makes it easier to play a fish in tight for a successful landing or release. Popular for Jigging also, use a windon leader as an alternative to a PR knot, to connect a leader to your braid.