On the Spade website, they suggest that a two-way (left-right) swivel should not be directly attached to the anchor - there should be a shackle in-between OR one should use a four-way swivel (adding up-down). One manufacturer calls it a multi-flex swivel. There is also a WASI ball swivel which has a good reputation. I bent my aluminum Spade stock using a two-way swivel WITH a shackle. As far as I can tell, the damage occurred during retrieval. I've switched to a galvanized Rocna and am grateful that we now have real examples of galvanic corrosion while using a stainless swivel. I'll still use it, but I won't use it for long-term anchoring.
Thank you, Ron Rogers
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