Sonic Foam System - Hex Nut Driver T-Handle Set - 9 Pieces - 26" (Medium) caraccessories This has 1/4" NPT threaded

This has 1/4" NPT threaded inlet and is Euro High-Flow standard outlet sizing

and Dane from The Rag Company

Inlet = 1/4" (National Pipe Thread) NPT Male:  This 1/4" male threaded end screws into a female 1/4" connection

Repeat application in case of especially stubborn soiling

then Sonax Perfect Finish

Sonic Foam System - Hex Nut Driver T-Handle Set - 9 Pieces - 26" (Medium) caraccessories This has 1/4" NPT threadedThese are the tools I've decided to use at OGHQ, they have a nice quality to them with good ergonomics. They aren't intended to replace everything but there is a great variety of tools offered here. For the price, you cannot beat them vs something that's 2x or 3x the cost like Snap On.