5/16" I.D. Stainless Steel Swivel Eye Bolt Snap, Display (146590-1) by Sea Dog®. Swivel Eye Bolt Snaps are designed for use with rope, chain, wire, or cable. They can be used for tie-downs, or multiple rigging applications. 360° swivel strap eye eliminates tangling. Spring-loaded bolts provide secure closure with the advantage of an easy-open thumb lever. Constructed of corrosion resistant investment cast 316 stainless steel.