Low Profile Direct Mount Diff Cleaner - Billet Aluminum - Cleaner will mount to the manufactures existing "breather" hole. Billet Aluminum - Cleaner body is machined from a solid piece billet 6061-T6 aluminum. Filter element is made of a self-cleaning polyproplene and keeps debris from entering the differential. In most cases no tools are necessary.will mount to the manufactures existing "breather" hole. Low Profile is used where room does not allow for the full size or you just want to keep everything "hugging" your axle. In most cases no tools are necessary.