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The advantages:
- marks on the swivel give a clear indication of inclination angels
- additional ball bearing system allows for smooth swiveling under load
- crimpfeature on the link prevents the link from kinking
- both internal and external surfaces are protected against corrosion by a tough galvanized coating
- improved swivel to surface contact is due to special machining
- ball bearing wear can be visually recognized by the gap on the wear ring without measuring instruments
- Secured four times against breakage in all load directions
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