ITEM NAME:Stainless Steel Quick Links Oval Carabiner Cable Shackle Connector 4mm Description: Made of quality stainless steel 304/316, two steel types available, never rust and able to bear heavily These oval link hooks have a screwable catch to allow for a quick and simple link of chains, smooth screw operation to securely close and lock An efficient way to connect, temporarily and permanently solution for easy connect ropes, chains or webbing Ideal for boating, camping, hiking and other indoor and outdoor activities, neccesary to keep as an assortment kit in your car or boat Turn clockwise to disconnect, safe and reliable choice Specification: The length "4mm" is referring to the diameter of steel ring thick. For details such as breakload and size, you can check the chart in the pictures. Breakload of 4mm carabiner: 560 kg/ 1235 lbs Breakload of 5mm carabiner: 730 kg/ 1610 lbs Breakload of 6mm carabiner: 1000 kg/ 2200 lbs Breakload of 8mm carabiner: 1750 kg/ 3858 lbs Package Includes: 1 piece quick link Note: This item is conforming to international standard DIN5299C. 10mm diameter of 304 stainless steel is also available in our shop, please check on it..Breakload of 4mm carabiner: 560 kg/ 1235 lbs. Breakload of 5mm carabiner: 730 kg/ 1610 lbs. Breakload of 6mm carabiner: 1000 kg/ 2200 lbs. Breakload of 8mm carabiner: 1750 kg/ 3858 lbs. These oval link hooks have a screwable catch to allow for a quick and simple link of chains, smooth screw operation to securely close and lock.