Upgrade to the Sunfish / ISCA 2:1 Mainsheet system to make sheeting in higher winds easier. This kit includes everything you need to convert your Sunfish to the new ISCA class legal mainsheet system. The 2:1 purchase gives you more power to control the sail in bigger winds, making it easier to sail all day long and stay competitive during racing. Features 2:1 purchase makes sail trimming in higher winds easier Compatible with all years of Sunfish / ISCA Easily convert back to the traditional 1:1 system on the fly and switch back to the 2:1 as needed Simple installation: no drilling or tools required