"The effect of sparkle and 34's unique open gape hook shape" A jig head that takes advantage of the tendency of horse mackerel to react to sparkling objects. It is shaped like the cut surface of a diamond, so when you move it, each surface creates shade and light. When light hits it, it sparkles. It also sinks straight without shaking, and even a slight change in the water flow is felt as a change in resistance because each surface receives it at various angles. The hook shape is also quite distinctive with an open gap. Horse mackerel sucks in the fish at a speed of 0.2 seconds. This special shape was chosen with the idea that "if the tip of the hook touches the inside of the mouth at that moment, it will take longer to spit it out." The hook material is made of a thin wire diameter to make it easier to penetrate, and to make it less likely to break, we mix a lot of carbon into the steel and process it to make it harder. As a result, combined with the shape of the hook, it penetrates smoothly into the pocket of the needle (the part that is most bent) and almost never stretches.