http://stedlin.com

https://www.amazon.com/stores/STEDLIN...

I've said it before and I'll say it again.
High Flow couplers with 1/4" NPT connections are all hype.
They are fine for use with high air consumption tools that use the 3/8" NPT standard but that's not what I'm talking about here.
There are numerous couplers on the market that are not compatible with the Euro plug standard often referred to as "V style" and yet have perfectly good performance when used with 1/4" NPT air hoses and air tools.
There is virtually no gain in performance by switching to the HiFLo couplers.