Caterpillar (CAT)-style premium aftermarket end bit. Part reference 9U8057. Application/reference: D5, D6 First Cutting Edge. Replaceable corner/end component that protects the blade and supports a clean cut. 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.