Grade 100 1/2" Foundry hook and grab hook connected to oblong master link. WLL 15,000 lb. Foundry Hooks are a type of hook that are usually designed without a latch. These are typically used in applications where there could be a safety risk if humans connect or remove the load from the hook. Foundry Hooks are typically used on chain slings and are designed to have a wide, deep throat to fit trunnions and handles on molds or castings for foundry work, hence the name. Eye Foundry Hooks have an “eye” at the bottom of the hook for attaching to chain. Clevis style foundry hooks have a cotter pin at the bottom to thread through the hole and attach to chain.