SGravityy (surf, gravity) pintail worm. Unlike conventional worms, the ring-shaped surface increases the contact area with water, and the surface tension increases water entanglement and buoyancy to increase fall speed. It is designed to generate vibrations and appeal to the target during restrained swimming. The pin tail, which is divided into two parts of the tail part, generates minute waves that quiver and quiver by transmitting the waves from the body as they are, creating a more natural swim. A guide fall is provided in the center of the body, and it is designed so that anyone can easily install it without the worm keeper coming out of the head shifting. Not only flat fish, but also a wide range of fish such as threaded blue fish, hairtail, and rock fish.