A heavy neckrig (omoneko) that is commonly known as "Neccoligu" using nail sinkers for greater distance, sensitivity, and ease of handling. However, the more you weight it up, the more the sinker you are worried about the angler. In order to solve this thoroughly, they created a dedicated sinker that is easy to handle with a screw type keeper. The weight shape is familiar with the straight worm, but the cylindrical shape makes it stable at the bottom and makes worms easy to stand. Its shape is not only great for Neccolig, but also for swim baits and offset hook rigs, it is a convenient sinker that can be used to reinforce weights of various rigs.