Edge 4-in-1 combination buckets are built of high-strength steel, and the clam shell bottom is shaped to prevent bowing of heavy material. Buckets are 36.3 inches deep and 21.3 inches high. Standard-duty buckets are for loaders with operating capacities less than 2,400 pounds and are available in 60- and 72-inch widths. Heavy-duty models come in 66, 72, 78 and 84 inches for loaders with operating capacities more than 2,400 pounds.