Ball bearing swivel bases feature dual rows of Delrin® ball bearings that swivel freely even under high loads. Bases include stand-up springs and a U-adaptor to accept a variety of appropriate blocks.Delrin® is a registered trademark of E. I. du Pont de Nemours and Company or its affiliates.
recommends equipping every system with Carbo lead blocks for safe furling from the cockpit. The 7403 outboard assembly allows furling line to travel outboard of the stanchion to keep the sidedeck clear. Block mounts with a strong four-screw clamp without removing the stanchion or lifelines.