This is a quality marine grade stainless steel (AISI 316) chain ideal for marine applications or where corrosion resistance is required. Great for anchor chain leads and other heavy industrial applications that require corrosion resistance. The link size is 1/4" NACM (National Association of Chain Manufacturers) or 7mm equivalent. This listing is for 50' of NACM chain. AISI 316 stainless is a premium grade of stainless and is considered by many to be best in class. 316 stainless is corrosion resistant and very durable even in the harshest of conditions. Breaking Load = 5300lbs