Ronstan’s Core Blocks feature a two-stage bearing system for improved performance in sheet and halyard applications aboard both cruisers and racers. Stage one provides “ultra-low friction” when handling moderate loads. The second stage engages when the wind pipes up and loads increase. Together the two stages cut overall friction by almost half. Other features include a “flare” design to reduce rope wear, removable becket pins for use with pre-spliced sheets, and a fully articulating support base for use in stand-up configurations. Alloy sheaves are available for use with wire cables.
From $89. Ronstan, ronstan.com