Ingenious little piece. A must have if you’re refurbishing your heavy duty wheel hubs. Way to go!

Really does push grease into front wheel bearings! Truck has 145K and hub turned easily, I pumped 10 times for each lug stud, and could feel the new grease drag on the hub bearing. You do need to remove brakes from front hub to access the ABS sensor where this fitting goes, but well worth it!

Great quality. Easy to install while replacing the hub on my 2000 f250. Fit perfectly without any issues. Another quality product from Riff Raff.

I seen a U Tube video on this item so I purchased it. I used red grease, high mileage so six pumps every two lugs. Truck rolls smoother and longer distances coasting. I plan to keep lubing every year.

This grease fitting give me peace of mind knowing some grease is in the hubs. I used Motorcraft grease part # XG11. It’s not cheap grease but had some interesting traits that sold me. This little part is genius and fixes a problem nicely. A little preventative maintenance goes a long way.

Cool shit

idea and use appear easy to use. Have not yet used this tool.

I wish I came across this sooner, tried to grease my front bearings without it and ended up wasting more grease without it. This made it so easy to extend the life of your front bearings.

Super! Worked like a charm. Excellent workmanship.