Swivels are installed between anchor and rode to
prevent twisting (particularly when chain is used), however many boaters are
unaware they can be installed incorrectly, as in the photo below. Ensure the
jaw fitting of the swivel is attached to the chain, not the anchor shank – the
swivel eye will be attached to the anchor shank with an anchor shackle – to
prevent binding and possible failure as the vessel sheers at anchor. The swivel itself should be drop forged (not
screwed, riveted, or welded together) and the largest size that fits the chain
link without binding.