ITEM NAME:M8 Standard 316 Stainless Steel Tech Diving Wing Bolt /Butterfly Wing Screws Description: - Material: 316 Stainless Steel - Bolt diameter: approx. 8 mm/0.31 inch - Bolt length: approx. 3.5 cm/1.38 inch - Maximum corrosion resistance and durability - For tech diving backplate, donut wings, or other purposes Package Included: 1 Piece Screw 1 Piece Butterfly Bolt 2 Pieces Washers.For tech diving backplate, donut wings, or other purposes. - Material: 316 Stainless Steel. 1 Piece Butterfly Bolt. - Bolt length: approx. 1 Piece Screw. People always bought together with.