Lewmar 38 Chain Stopper When your windlass is not in use and the boat is at anchor, the chain should be secured using a chain stopper. This helps prevent damage to your windlass. This Lewmar 38 Chain Stopper has a Safe Working Load SWL that is greater than the SWL of the chain and is constructed of 316 Stainless Steel. Fits 38 chain. California Residents WARNING Cancer and Reproductive Harm - P65Warnings.ca.gov Other Details Google Product Type Chain Wiser Yes Product MPN 66840079 Product UPC 74