With our design the retainer ring balls have a flat surface contacting your flag pole instead of a round surface contacting your flag pole. A round on round has less pressure displacement which causes damage to your flag pole quickly. We use a reinforced nylon material, which holds up to the cable wear on the retainer beads. Wearing a grove in bead and restricting rolling ability will happen with standard retainer rings. With our design this product will not only outlast all competitors but ultimately cause the least flag pole damage compared to any product available. Different color or custom color arrangements are available.