Caterpillar-style bolt-on heavy-duty center cutting edge for a D9 Caterpillar Bulldozer is a double-beveled reversible bucket cutting edge that is inches ( mm) thick, 13 inches (330.2 mm) wide, and inches (1, mm) in length. It requires twelve 1 x 3.5 inch (25.4 x 88.9 mm) plow bolts and twelve 1-inch (25.4 mm) hex nuts. The bolt hole spacing is 6 inches (152.4 mm) from center to center, and inches ( mm) from the edge of the bucket cutting edge to the center of the first hole. 9W-7043