The Hall anchor is the most commonly used conventional shackles ship anchor. In this anchor category, there are three types: TYPE A, B and C. On the end of shank, there are three shackles for your choice: Crownshackle(anchor shackle), swivel,and M&F swivel. We could say Hall anchor, Gruson anchor and Union anchor look similar. But as a trader, user, or supplier, normally you don’t need to know the details because it is only different from structure. If you really have interest, we have all information for your reference. Just contact me to get what you need for free.