A must for big game fishing and heavy-duty trolling. PREMIUM QUALITY - Barrel swivel with safety snap made of high-strength steel with corrosion-resistant black finish. Excellent corrosion resistance, abrasion resistance and shock resistance, for saltwater or freshwater fishing CONVENIENT DESIGN - Convenient unlocking design, the dock lock snaps allow you to quickly change the bait or fishing line, will not delay your fishing SMOOTH - Barrel swivel allows for smooth rotation; swivel provides maximum protection against twisted and tangled lines WIDELY APPLICATION - Suitable for saltwater fishing, high speed trolling, jigging, offshore fishing. Small size would work great for freshwater like bass fishing Age