Caterpillar (CAT)-style premium aftermarket weld-on base lip. Part reference 7I3015. Application/reference: Weld-On Base Bolt-On Segmentn 966K / 972. Welded bucket lip/base edge that supports the working edge, adapters or replaceable wear components. Weld-on installation; no mounting plow bolt is required. 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.