This Seachoice Anchor Swivel helps ensure the most effective anchoring by allowing the anchor chain to swivel with changing currents. This freedom of motion helps prevent the chain and anchor rope from getting twisted or being subjected to excessive lateral forces that could compromise your anchoring. This premium Anchor Swivel is made of 316 stainless steel for corrosion-free reliability. It measures 3 ½ inches long, with a 5/8-inch opening on the anchor side and a 9/32-inch opening on the chain side. When inserted between the anchor and the lead chain, or between the chain and the anchor line, this Anchor Swivel can prevent the chain and anchor rope from getting twisted. This Anchor Swivel enhances the reliability of your anchoring and provides peace of mind that your boat will remain anchored as desired. Seachoice is committed to delivering quality marine accessories and OEM replacement parts to satisfy fishing, boating and watersports enthusiasts worldwide. Seachoice is run for and by boaters, offering a wide-ranging product line while remaining affordable.