Whitecap Stainless Steel Anchor Chain StopperPrevent damage to your windlass with the Whitecap Anchor Chain Stopper. Constructed of 316 stainless steel, this chain stopper is suitable for use in fresh and salt water applications.Features: Secures chain to prevent damage to windlass; 316 Stainless steel construction; Specifications: Length: 3-1/8"; Width: 2-1/2"; Pin Diameter: 1/2"; Fastener: 1/2" (2);