The Englund Heavy Corkscrew Swivels are very strong swivels designed to make switching out leaders and rigs very easy. Makes changing fly leaders/colrs very easy by simply twisting the mono loop of the fly leader onto the corkscrew, no tieing required to change fly or squid colors. The corkscrew bucktail fastener is designed for quick and easy leader and rig changes without tying. Assembled with a power style closed swivel for maximum protection against twisted and tangled lines, this swivel is a must for big game fishing. We offer the Englund Heavy Corkscrew Swivels in four sizes: #5, #6, #7 and #9. 1 per pack.