Discover these 40 - pack heavy - duty chain links. Each 5/16 in. quick link is made of high - quality steel with a corrosion - resistant coating. With a length of 3.2 in. and an M8 X 80 mm size, they can bear a 1200 lbs. load. The threaded ends and hex nuts on the locking carabiner clips offer extra security. Their user - friendly thread lock design has a large opening for easy use. Whether you're hanging a porch swing, doing emergency chain repairs, or working on a DIY project, these quick links are a great choice. They're perfect for gym equipment, boat trailer chains, and even hanging plants. Their smooth operation makes them suitable for both permanent and temporary applications, bRinging convenience to your indoor and outdoor activities.