The Harken 40mm block on Dyneema line with a safety snap shackle is a must-have for top competitors. This setup allows you to create your own 4:1 mainsheet block-ring combination, enhancing efficiency with a low friction, lightweight, and durable solution. To complete the 4:1 system, combine it with the Windesign 38mm low friction ring and a bit of 2.2mm Vectran line.
