This is for two (2) quality marine grade stainless steel (AISI 316) bow shackles. Each shackle is stamped 316 and laser etched 3/8" with the manufacturer's mark. The shackles are marked in the US specification style of 3/8" (for the shackle size). The Metric equivalent is generally considered to be 10mm. This is a forged shackle, which for load bearing applications is a cast shackle. Not to be used for overhead lifting. 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. Working Load Limit = 1070kg.