Again this is a high quality component, with smooth running bearings (even without load in my experience) and a 'collapse load' equivalent to the drum, i.e. 20kN. The swivel fits between the top of the spar and the end of the genoa halyard, and has a generous-sized oval ring to which the halyard can be attached with a shackle etc. in the usual way. (The swivel allows the sail to be furled or unfurled without introducing twists into the halyard.) A good quality swivel is important in any furling or reefing system, but some of the cheaper versions are not really up to the job and tend not to work properly under load. This one is engineered to work well under load, and does so. As with the drum, the swivel supplied in this system could be used as part of a non-reefing furling system with a view to a subsequent upgrade.