This is for one (1) quality marine grade stainless steel (AISI 316) turnbuckle (or bottlescrew) jaw and jaw. Each turnbuckle is laser etched with the grade 316 and the size M8. This is a metric turnbuckle with M8 threads. A locking nut is supplied on each end. 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.