ABN 4-Way Grease Fitting Tool &ndash; To Install, Remove, Repair, and Maintain Any Straight, Angled, and Pin Zerk Fittings Practical: Use the ABN 4-Way Grease Fitting Tool  To Install, Remove, Repair, and Maintain Any Straight, Angled, and Pin Zerk Fittings to maintain a riding lawnmower or other tool with grease fittings Versatile: All-in-one solution for grease fitting installation and removal; Designed to clean out the threads of a clogged fitting so you can thread in a clean fitting (retapping holes for new fitting installation); Also assists with the removal of a worn or broken fitting Install: For new straight and angle type zerk fittings Rethread or Remove: For broken and old straight, angle, or pin type fittings Compatible: Suitable for 1/4-28 and 6mm fittings, 1/4"-28 tap thread repairs, and 5/16" and 3/8" hex fitting and plug removal with wrench