For this kind of lure with a huge wing It has a weak point that it is hard to fly. The retractable wing was installed to overcome this weakness. The wings close during casting, reducing air resistance to stabilize the flight distance and opening the wings simultaneously with landing will not reduce the response. The prop with two medium-sized wings rotates smoothly even at low-speed retrieves, and stable retrieval is possible even at high-speed retrieves without tilting the body. It is also effective to use stop & go, ripping, etc. The bubbly sound of props biting water and the metallic sound of two washers installed between the body stimulate the bass.