Traditionally pulley rigs were made by using a standard swivel, this method was prone to breakages as the full force of the cast was placed on a very small area of line, constant casting could weaken the rig body making the rig break during the cast or when playing a big fish. By incorporating one of our strong rolling swivels into a plastic housing, the Tronixpro Pulley Bead spreads the load of a cast across a wider surface area. This eliminates damaging the rig body, producing a stronger, safer rig. Although designed for pulley rigs, it can be used for Portland style rigs and as a short boom when making one up / two down style boat rigs.