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.