Farmall Cub

http://www.ebay.com/itm/WILMAR-RIGHT-AN ... 0e&vxp=mtr

I am a sucker for most new tools that appear. Experience says that about half of them are a waste of money-- but some real winners may also be discovered.
This grease gun coupler is not a winner. It does not seal to the fitting, the grease just pushes out the end of the coupler. I had high hopes for this coupler, now all I have are disappointments. And I paid a higher price for the one I bought too.

That looks a whole lot like one I got a couple years ago. At least I bought it locally, so it went back to the store. Later on, I got a similar one of a different brand (maybe a Lisle, I'd have to check). It works fine, in fact I used it today. I screwed a zerk into the end of it so I can just snap it onto my grease gun without removing the straight coupler.