It makes perfect sense that sideloading a conventional anchor swivel could blow it apart if there is no length of chain and shackle between it and the shaft. This Mantus Marine swivel https://amzn.to/2tEVcsn solves that and has some crazy breaking and yield strength numbers!! The strongest anchor swivel on the market?

Review of Mantus Anchor Swivel after 1year of every day use:    • 1 Year on the Sea Floor! Comprehensiv...   Was there Galvanic Corrosion?