The Marukyu Umajime Salt is specially crafted to tighten essential boat fishing baits like sardines, Pacific saury, mackerel, round herring, peeled shrimp, krill, and clams. Infused with fish-attracting amino acids, this salt enhances the bait's feeding power while ensuring a secure grip, preventing it from being easily taken. It makes bait attachment easier and more efficient, allowing for quicker and smoother baiting processes, making it ideal for boat fishing.