The 4 Way Grease Tool is a handy, dual purpose tool for removing worn and broken grease fittings as well as retapping holes for installing new grease fittings. It works with both straight and angled fittings and is available in small and large sizes for use on almost all threaded fittings. For installing straight grease fittings. Screw extractor for removing worn and broken grease fittings. For installing angled grease fittings. Hardened tap for retapping holes.Small Hex Size: 5/16” (7mm) Tap Rethreads: 1/4”