Sea-Dog Stainless Steel Chain Stopper - 5/16" - 3/8" [321825-1] Boating Safety Output frequency regulation: 60Hz

Output frequency regulation: 60Hz

Anchor has wing nuts and bolts for assembly/disassembly without tools

Dramatically enriches color and shine of fiberglass and gel coat surfaces

secure hold and the included hardware is stainless steel

No springs

Sea-Dog Stainless Steel Chain Stopper - 5/16" - 3/8" [321825-1] Boating Safety Output frequency regulation: 60HzStainless Steel Chain Stopper 5 16" 3 8" Chain Stoppers help prevent damage to the windlass and reduce the risk of accidental free fall of the anchor while under way. Chain Stoppers mount alone or inside most bow rollers and work with your anchor roller to take tension off your windlass. Chain and rope should be secured at anchor when your windlass is not in use to avoid high loads the windlass was not designed for. 321820 fits chain sizes 3 16" 1 4".