The Krok Stainless Steel Ball-Bearing Coastlock Swivels feature patented, one-piece bodies, made of incredibly strong stainless steel and feature a black-nickel finish and double-welded rings for added durability whether you're fishing inshore or offshore. Knurled finish on body enhances gripability. Smooth rotation on each end reduces friction and eliminates frustrating line twist. Patented one-piece body constructed of brawny stainless steel Knurled finish on body enhances gripability Durable double-welded rings