Sonic Tools - Wedge Utility Set - 5 Pieces pressure washer individual upgrade kits This is the larger set

This is the larger set of sockets

I suggest you pick up these bonnets that fit over the tool

What you really want is a complete sprayer/wand/foam cannon upgrade kit

Use the 24mm (or 1") wrench to install the coupler by pushing against the other wrench

If you own an OE pressure washer hose and want to have a stouter quick disconnect experience between your sprayer and hose

Sonic Tools - Wedge Utility Set - 5 Pieces pressure washer individual upgrade kits This is the larger setThese 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.