Caterpillar (CAT)-style premium aftermarket dozer cutting edge. Part reference 9W1878. Application/reference: D6 Cutting Edge. Replaceable blade edge for dozing, spreading and finish work. Mounting: 3/4-in plow bolt; confirm bolt length and the exact hole pattern before installation. Brand reference: Caterpillar. PETRAX premium aftermarket replacement; OEM names and part numbers are used for identification only. This item fits only the specified system and matching mounting dimensions.