Eye bolts are a tremendously popular rigging component, especially this style. Regular nut eye bolts do not have a shoulder which makes them easy to install and usable in many applications. They are popular for lifting, bracing and zip lining, just to list a few common examples. Chicago makes theirs from forged steel, right here in the U.S.A. They are heat-treated and feature a hot galvanized finish. Their Working Load Limit is based on a safety factor of 5:1 for straight, in-line loading. Angular loading should be avoided as it reduces the Working Load Limit.