Rupp Marine Pulley Clusters are made from aircraft grade aluminum and bright anodized, these pulley clusters are designed to replace any Rupp outrigger eye-bolt. Smooth roller action eliminates eye-bolt and halyard line wear. Designed to be used in combination with each other for double or triple rigging of outrigger halyard lines. Ships complete with pulley cluster and locking washer. DOES NOT ship with 1/4-20 stainless steel mounting bolt (customer supplied). Available in single, double, or triple pulley(s).