Specification: These 5/16" chain links (SNQL-13) weigh 2.5 oz (70 grams) each and offer excellent strength and toughness thanks to their high-quality materials. Their working capacity is up to 1250 pounds. These quick links are suitable for cables with a diameter smaller than 0.3 inches. Material: These quick link connectors (SNQL-13) are made of premium 316 stainless steel, which provides excellent resistance to atmospheric corrosion and salty environments. They also resist corrosion in polluted marine atmospheres. Applications: These SHONAN 3" quick links (SNQL-13) are designed to create permanent or temporary secure connections. These heavy-duty chain connectors are widely used in marine, fitting, and water treatment industries, and are also perfect for outdoor activities. Easy to Use: The design of the threaded end and hex nut provides a tight and secure connection without any tools, and these links are easy to disconnect even after being closed for a long time. Satisfaction: This package includes FOUR 3-inch stainless steel quick links, along with a one-year warranty. Each chain connector is equipped with a nut to ensure a secure connection. It enables strong, quick attachment to rope, cable, chain, or other stainless steel lines. When using the connector, please tighten the nut securely with a wrench. Every piece of SHONAN steel hardware comes with a one year free replacement service in case of any failure. Not suitable for climbing. DO NOT USE under any circumstances where disengagement could result in personal injury or property damage.