Miller Cast Iron D-ring commonly used with small wreckers including Century311/312, Century 602/612, Vulcan 880 Series, Holmes 440 Series, Challenger Century and others. Requires Retaining Pinfor Installation (Part #BA0259). Heavy cast iron construction 4 7/8″ wide at the base x 6 1/2″ long Opening is 2 5/8″ x 3 1/8″ Requires 1″ retaining pin (Part #BA0259) Dimensions: 7″ L x 5″ W x ” H Inside Diameter: 3.06″