Koch Industries 2035441 Swivel Round Eye Cap Snap, 3-1/2-Inch with 5/8-Inch Eye, Zinc Finish Designed for use with rope, chain, straps, animal leashes and other home, farm and recreational applications Swivel round eye eliminates tangling Used to connect lifting and rigging attachments Maximum load of 75-pounds Spring-loaded bolts provide secure closure; easy-open thumb lever