The ingenious, handy Powerbuilt Deluxe Portable Bearing Packer makes replacing bearing grease a whole lot cleaner and a little fun. It works on bearing up to 3.5” OD, and is able to simultaneously eject old grease as it injects new grease into bearings. The fresh grease stays under plunger for multiple uses between reloads, and will not leak out. This helps greatly reduce the time for mess cleaning, while allowing you to easily re-grease roller and other bearings. The cap protects grease and plunger from dirt and dust during storage. Plus, it meets or exceeds ANSI standards.