Review on PROLUBE Quick Disconnect Grease Coupler: Mess-free & Hands-free Operation, 8,000 PSI Capable, Works with All Grease Fittings - #43546 by Jason Dahlkemper

I work with heavy duty stump grinders and this quick coupler is the best I've ever used functionally. It appears to deliver lube with less back pressure than other quick couplers and connects quickly. However, I can see that some people have issues with the size of the front hitch, which is a bit larger than others, making it unsuitable for tight spaces. When the grease nipples are wide open, however, it has a firm form fit and I am very satisfied with that. I pump a 5 gallon bucket and several cases of hoses every year, as well as different formulations of professional lubes every year, and have tried pretty much every fitting. This one is definitely the best. **Update: The grease nipple keeps popping up and it has become difficult to get into the grease nipple. I don't know what happened but I switched to another brand.