Marine Grade Stainless Steel Rigging Eye Bolt Chooze Size M6 to M20 Marine Grade Stainless Steel Rigging Eye bolts An eye bolt is a screw with a loop on one end and threads on the other end. Made from stainless steel for maximum corrosion resistance and durability. Marine grade stainless steel has superior corrosion resistance and strength over grade 304 1 piece eye bolt electric polished