Caterpillar (CAT)-style premium aftermarket hot-cupped end bit. Part reference 8E9379. Application/reference: D4 Hot Cupped End Bit. Formed end bit that protects the blade corner in dozing and high-wear applications. Mounting: 5/8-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.