Its a grease gun, I don't really understand how so many people are struggling to use this. Load it, pump grease into fittings/nipples, don't store fully pressurized.I did the ball joints on three different vehicles, replaced the tie rod and drag link on a Jeep JK with updated steering components that have grease nipples, and use this to service a small tractor. Works like a champ. Good, solid nipple seal when pumping.Took one star off because regardless of how tight I get the relief valve, it leaks a small amount of the Lucas heavy grease (though it is in a garage in the NC summer heat). Not a deal breaker, I lose a single sheet of shop towel a week to wipe it off and keep it clean in between uses. Overall good purchase, this is not a $100 grease gun made with Unobtanium o-rings and diamond coated steel but works fine for personal use, buy without hesitation!
Rating: [4 of 5 Stars!]