This is for ten (10) quality marine grade stainless steel (AISI 316) D Rings Welded 3mm x 25mm ID (1/8" x 1"). 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 for a long service life.