Heavy Duty Carabiner Hook: Made of 304 stainless steel, which is waterproof, rustproof, strong and durable. Thickness: 8mm; Length: 80mm. Working Max Load: 200kg. Allows quick connect/disconnect of ropes, chains and straps. For backpack, keychain, chains, ropes, camping, hiking, fishing, pet, indoor outdoor gear equipment, DIY accessories.