1、The stainless steel anchor chain plug can effectively prevent the windlass from being damaged. Suitable for 5/16 inch (8 mm) chain. 2、It is made of stainless steel and is electroplated, which is not easy to rust, durable, and has a long service life. 3、Can be used in conjunction with anchor rollers to reduce the tension of the windlass 4、When not in use, just flip the pawl up to handle the 5/16 inch chain, which is very convenient. 5、With compact shape, lightweight and portable, take up no space and you can put it anywhere. 1 x Boat Anchor Chain Stopper Item Type: Boat Anchor Chain StopperMaterial: Stainless SteelColor: SilverCenter Distance of Mounting Hole: Approx. 33mm/ 1.3inApplication: Suitable for 5/16in (8mm) Chain