CM® Eye Foundry Hook, Dual Rated, series: Herc-Alloy®, 80/100 Grade, Eye Attachment, Steel Alloy, Orange Powder Coated, For Use With: HA800 and HA1000 Chains. CM® Herc-Alloy® Eye Hooks are an Excellent Choice When Used with Mechanical Couplers Such as The CM® Hammerlok®. These Hooks are Designed For Overhead Lifting and Can Be Used in Place of Clevlok® Hooks If Preferred.