The Invincible Marine BR54506 5/16-Inch Stainless Steel Quick Link is durable and backed by Invincible Marine’s standard of quality and strength. Attach two lengths of chain without cutting by using the easy-open threaded nut that provides secure closure. Quick links are traditionally used for joining chains and forming connections, and are well known for their creative applications, used as key rings and backpack accessories. This 5/16-inch quick link has a 5,000-pound rating, and is great for anchor chains and trailer safety chains, and should not be used for towing or lifting humans. Precision and reliability are the marks of quality that this product has proven time and time again, guaranteeing steadfast performance with each use. The Invincible Marine BR54506 5/16-Inch Stainless Steel Quick Link comes with a 1-year limited warranty and protects against manufacturing and workmanship defects. Rugged, tough and reliable, Invincible Marine is well-known for their hardworking nautical line. For freshwater and saltwater boating, Invincible Marine designs products for avid fishermen and weekend boaters. Quality, utility and innovation go into every Invincible Marine product giving you more time on the water.