What are NEMA 6-20 250V receptacles used for?

[oil pan 4]

I recently moved into a home that has several of these outlets in various places throughout. After a bit of googling, they appear to be NEMA 6-20 250 volt receptacles. In my 52 years, I haven't ever owned anything that plugs into this type of receptacle. Do you all have any of these outlets in your place, and what do you plug into them?
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I plug my Nissan leaf charger into one.

 

[Astro14]

Table saw
Jointer
Dust collector

Mine all run on 240 volts.

 

[Albin]

I use that outlet to power my 2 hp 3-phase 2x72" grinder motor.

 

[Brons2]

People seem to use it for 240V air conditioners (not the kind you put in the window, but apparently there are special air conditioners that use their own 240V circuit)

Some people also use them for EV charging

That's what people said in Amazon reviews of a NEMA 6-20

Further reading says it's used in commercial kitchens

That makes sense if you are limited on amperage, but can put a 2 pole 20A in at 240V nominal. You'll get double the wattage of a 120V 20A.

 

[kschachn]

I use that outlet to power my 2 hp 3-phase 2x72" grinder motor.

You power a 3-phase motor from a single phase outlet?

 

[oil pan 4]

I use that outlet to power my 2 hp 3-phase 2x72" grinder motor.

My big Bosch 9 inch grinder and portable spot welder uses it too.

 

[Pablo]

My big Bosch 9 inch grinder and portable spot welder uses it too.

3 phase?

 

[oil pan 4]

3 phase?

Just single phase. It's just portable hand held stuff. I missed the part about 3 phase.