World's Smallest Grease Gun Coupler (Only 0.53 ") with Cleaning Tool, High Pressure Quick Release Grease Tips,Fit All 1/8" NPT Manual/Electric Grease Gun, for Greasing Locks onto Zerk Fittings

Seems to be OK. I have not used it. I am giving it 5 stars because it appears OK but I can't guarantee it's utility. I saw some on the local market for $85 (not the same brand) but at this price plus the cost of freight forwarding to Panama the country and I can't complain about its appearance.

Original coupler from my 20 year old made in India Harbor Freight grease gun measured in at .588”, this one measured in at .537”.My old couplers teeth were worn out and the inner bushing was broken. Making greasing impossible. This new coupler definitely is smaller in diameter. The jaw extend out, and a little pressure it slips on the fitting. I just rebuilt two drive shafts, and greasing the U-joints was a breeze. Definitely recommend, saved me time, frustration, and a cleaner grease job.

Holds zerk fitting much better than a regular push on coupler. Small enough to get into small areas.Worked on the first three fittings. Then the release lever popped off. I was able to reattach the release lever without too much difficulty.

Used this bad boy a couple times, and i wont be without one again. Makes getting to hard places much easier. Quality seems pretty nice too. All in all its well worth the price. I think a quality grease gun should come with it.

This grease coupler is a great Idea that DOESN'T work in most conditions. If you got a perfect grease zert in ideal conditions may work ok sometimes but the reality is if it is not perfectly locked on straight (which requires a LOT of pushing force while depressing the lever) then it will hold until it gets pressure behind it, then pop off and make a mess, most of the time the little lever will come unlatched from the mechanism and is very difficult to put back together. In the course of greasing one little excavator it popped off 7 times, came apart 3 times and resulted in being covered in grease with 2 blood blisters from trying to put it back together every time it came apart. This coupler is in the trash now, they need to go back to the drawing board with this one.

This is just a great kit for anyone that has a vehicle that still has grease fittings. I work on a lot of classics and this is an invaluable tool for routine maintenance.

Only useful it a few times but works really well.

-Took forever to get primed.-The top of the valve in the video shows a bulk fill feeder, zerk, and air bleed. What I received did not have the bulk fill, and a plain cap screw instead.As you can see in the picture, I had to remove the "360* swivel fitting" in order to get it to prime and hold pressure. This is disappointing, because there's nothing on the hose that rotates, so if you need the zerk adapter on the end to rotate, you have to rotate the whole gun.Once primed, it seems to work alright. I like the double lever QD zerk adapter on the end, makes it easy to get to multiple zerks, and the zerk cleaner, and needles are useful.