Caterpillar (CAT)-style premium aftermarket end bit. Part reference 177-4552. Application/reference: D6 Cutting Edge LH. Replaceable corner/end component that protects the blade and supports a clean cut. Left-hand configuration. 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.