The grade 100 swivel self-locking hooks TWN 1838 are used to assemble chain- and wire rope- slings and are often used in the construction industry. The swivel with ball bearing allows the operator to swivel under load. When the hooks are under load, they lock automatically. They may only be reopened manually when the hooks are not under load anymore.
The manufacturing and testing requirements comply with the DIN EN 1677-3 under consideration of the grade 100 load capacities.