The grade 80 self-locking hooks with eye TWN 0798 are used to assemble chain slings and are often used in the construction industry. The associated lifting chains are assembled by using connecting links, e.g. THI-LOK®s TWN 1320. The hooks lock automatically when under load and may only be reopened manually if not under load anymore.
The self-locking hooks comply with the DIN EN 1677-3.