Portable bearing packer from ABN. It squeezes out the old grease and pumps in new grease. It is easy to use. You fill it with grease (you can use a regular grease syringe, by the way), put the bearing in there, push the white handle: the old grease comes out, the new grease goes in. It fits bearings up to 3.5 inches in size. That means it can handle just about any bearing in your car. It's made of durable plastic, so it will last a long time. It only weighs a little - you can easily take it with you to the garage or to work.