This is for one (1) quality marine grade stainless steel (AISI 304) Type K Forged D shackle. The shackles are made in the US specification style of 9/32" (for the shackle size). The metric equivalent is generally considered to be 7mm. Not to be used for overhead lifting. AISI 304 stainless is a standard grade of stainless. Breaking load 4400lbs.