Keeping the concept of the first Deco Pen, "S-shaped action that dive while wearing bubbles when jerk, and dart to the left and right", keeps the buoyancy that ST-66 can be attached to correspond to larger blue objects. Still, I pursued a sharp action. It is easy to dive even when the waves are high or the scaffolding is high, and it attracts fish firmly. In 2016, a large 220mm model appeared. It also supports Omasa and tuna from the Genkai Sea, yellowfin tuna from Nanki, Mie, and Suruga Bay, and GT.