ITEM NAME:Boat Marine 1/2" D Ring Anchor Shackle Screw Pin - 304 Stainless Steel Description: - Screw Pin Straight Anchor Shackle - 304 stainless steel, bad weather resistance and friction Resistance - Super Strong and Lightwight - Easy Attachment - Using for marine, Shade Sail, Boat, etc. Specification: - Type: "D" Shackle - Material: 304 Stainless Steel - 2 Hole Inner Diameter: M12 Package Included: 1 Piece D Shape Shackle.Screw Pin Straight Anchor Shackle. - Type: "D" Shackle. 1 Piece D Shape Shackle. - Using for marine, Shade Sail, Boat, etc. - 304 stainless steel, bad weather resistance and friction Resistance. - Material: 304 Stainless Steel.