The KROK Swivels Stainless Steel size 5 with a 330lb. test capacity are designed for durability and strength in fishing applications. Made of corrosion-resistant stainless steel, these dual rotation ballbearing swivels are black in color and feature a coastlock design for secure connections. The 2-pack of swivels ensures that anglers have multiple high-quality attachments for their fishing gear, making them a reliable choice for marine environments.