[Mackerel Bones] A tool for removing the spine of frozen mackerel that is often used for ala-fishing bait. When you remove your spine and become soft it will increase the probability of eating ala. Push out the bone from the pipe with a boning rod. [Mackerel Loop] Tool for pulling Harris through mackerel with a mackerel boning and removing spine. Insert from the tail side and watch the head through the harris loop and pull it back. Keep the hook out of the fish for better hanging.