Powerhouse Products cross buffs polish ports perfectly! Engine building is a precision job. Powerhouse cross buffs help you accomplish the end results you want. Available in medium, fine, and very fine grade, they're perfect for finish polishing intake and exhaust ports, carburetor venturis, the inside of lifter bores, valve bodies, and much more. Designed to be used with their cross buff mandrel, these quality buffs have a tough cross or staggered pattern to efficiently do the job right. Precision is power with Powerhouse Products cross buffs.