Discover the Lewmar 60mm Synchro Cheek Block, a complete overhaul in block design that transforms speed, efficiency, and control. This Lewmar 60 block features scientifically optimized dimensions, free-rolling bearings, and a self-pointing head that collectively reduce friction and boost efficiency by up to 40% over traditional main sail-systems. Experience synchronized rope movement for easier power transmission from deck to sail while also reducing rope wear.