SWANLAKE Hand Bearing Packer,Wheel Bearing Packer Tool,Portable Bearing Packer, Product Details Manufacturer: SWANLAKE Brand: SWANLAKE GARDEN TOOLS Item Weight: 1 pounds Package Dimensions: 5.2 x 4.33 x 4.25 inches Manufacturer Part Number: SW-66026 1.Flushes Out Old Grease and Repacks Bearings with Less Mess 2.The Handy Packer works on bearings up to 3 1/2″ O.D. Grease bearing packing tool measures 4.5 inches (11.5cm) tall, 4.3 inches (11cm) in diameter 3. To pack a bearing, place the bearing on the piston .The grease stays in the tool cavity, not on your hands. 4.Press down on white handle until old grease pushes out, filling your bearing with new grease; Use green cap to protect new grease from contaminants when not in use 5.This portable bearing packer save a lot time and could be used anywhere.helps you to remove old grease and add new grease easier.