The Tronix Pulley Beads have been designed for sea fishing, specifically for building pulley rigs. They are encased in plastic, spreading the weight across a larger surface of line, eliminating line damage.Made for building pulley rigsUnlike using a traditional rolling swivelEncased in plastic to spread the weight across larger surface of lineEliminates line damageCan also be used for Portland style rigs as short boomFor one up/two down style boat rigs6 per packBreaking strain: 95lb/43kgSize: Large