This is for one quality marine grade stainless steel (AISI 316) 1/2" UNC turnbuckle with eye and eye. Each turnbuckle is stamped with the grade of 316 and the size of 1/2". 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.