ZooYL Bearing Packer - https://amzn.to/4bLlQAN (Affiliate Link)
From the webpage:
ROTATION HANDLE DESIGN: With this design, you don't have to laboriously push down on the bearings. A few simple rotations of the handle do the trick easily, efficiently, and without much effort.
EFFORTLESS REFILLS with ANY GREASE GUN: Refill with ease! Designed for seamless use with any standard grease gun, this tool offers mess-free and quick refills, making your maintenance tasks smoother and more efficient. Save time and keep everything running effortlessly.
50-INCH DROP PROTECTION: You no longer have to worry about dropping and damaging your device or making a huge mess on your garage floor! Thank you for this brilliant feature!
AUTOMATIC BEARING CENTER LOCATOR: This will help you find the center of the bearing more quickly and easily than before. With this tool, you can inject grease more uniformly and precisely. It's time to make your masterpiece.
TACKLE BEARINGS UP TO 3.5" O.D.: Perfect for grease-packed wheel bearings, this tool makes lubrication of ball, roller and needle bearings simple and efficient, saving you time and effort in every task.