Fastway® Tethered Ball Cover for 2-5/16" Ball. Lubing your hitch ball is good. Getting grease all over your pants is not. Don’t waste time trying to get the grease off you and your kids, instead, grab a Fastway® tethered Ball Cover. This ingenious solution will keep grease off your clothes, and it has a handy tether to keep it in place while you are towing your trailer. Let the new Fastway tethered Ball Cover take away some of the hassle and mess of keeping your hitch ball lubed up properly.