Hook bolts
Hook bolts are similar to eye bolts, except that the "eye" at the end of the bolt is not closed as it would be with an eye bolt.
Like eye bolts, hook bolts can be used for many things in the fence world, including straining wires from posts and other structures, tensioning wires and more.
Hook bolts are available in a wide range of sizes and diameters, and you can buy galvanized or zinc-coated hook bolts, stainless steel hook bolts, brass hook bolts, and hook bolts with a variety of finishes, so there's usually one that suits every fence project and requirement.
When shopping for hook bolts, be sure to confirm the hook size as well as the length of the threaded shaft, so you can be sure it will suit your needs.