The Momoi 90018 Fluorocarbon Wind-On Leaders are attached with a loop-to-loop connection to your fishing line. The Diamond Wind-On system improves bate presentation, eliminates the need for conventional long leaders and provides safer handling and releasing of fish at the boat. (Measures 25-feet in length). Momoi Fishing is the pioneer of fishing line developments. In 1951, it became the first company in the world to adopt synthetic fiber as the material for fishing lines.