Klein Tools 86939 Hex Adapter for 1/4-Inch Square to 3/16 and 5/16-Inch Hex for Refrigeration Wrench, HVAC&R

It works, and it's perfect for a small tap in the A/C.

Does not fit most suction line valves, too small.

One of the only bits I can find that’s worthwhile and fits the 454B spots. It holds up well and almost feels like an allen wrench. Definitely worth it.

I didn't want some cheap garbage that typically you get from Amazon. This is a quality Hex adapter that replaced my wornout one from years in the field. I got it for my new personal Goodman condensing unit and it worked fine . Pleased I didn't buy a cheap quality item that could actually damage my service valves.

Works with most service wrenches fits both king valves it's definitely a good buy if you need one