I have been swapping my air fittings over to prevost high flows, I wish I had just gone with them in the first place, the Milton high flow are the same standard, but they wear out so quickly. I have replaced several that were on impacting tools, so they aren't rated for impact use, then I have replaced three of the couplers, they get to the point where it takes two hands and my full force to get them coupled. I use the air tools so limited in comparison to my mechanic buddy, he has had the prevost for years and hasn't replaced one, not even the tool end on his impact tools. I just placed what I hope to be the last order for that style couplers, this should allow me to have both the Hill and the Salvage Garage reworked, I even should have setups for Perk and the portable compressor. The good thing is that the Milton tool ends will work with these couplers, so I can still use those as needed, I will say that the prevost couplers have squeaked out a bit more volume, you can see the size difference, so all my tools are getting new ends just for the extra flow. To give you an idea, my 1/2" line that has a 3/8" NPT end had much larger quick connects on it, the prevost ones are essentially the same size but have higher CFM specs do to the coupler. Later I will upgrade a few tools to even larger ones as needed, but for now these should be fine. If anyone is looking to upgrade to higher flow and easy connection and disconnection, just go with these and be done with it. They are the black body with green push button, I think they are considered 1/4" bodies. They also have 3/8" and 1/2" bodies, but those are for much larger setups, I will eventually need some, but for now the 1/4" are fine.