There are a multitude of machines meant to drive nails in. This device punches them out. It is a very simple pneumatic punch. The device is slid over the pointy end of the nail or staple and the trigger pulled. Most times they shoot right out. These machines are used by those who recycle wooden pallets.
The brand name of this one is Air Locker. They cost $60 on Amazon. I bought the compressor on used Victoria, for $40. The unit has easily paid for itself on the first job that I've done with it.
It works really well for nails 2 1/2 inches or less. Operation is very straightforward. Slide it on, pull the trigger, move to the next one. It saves somewhere around 70% of the labor , when compared to hammering the point of the nail and then withdrawing the nail with a claw.
I have only found one other unit of this sort. It is a heavier and much better built device that sells for $500 and change. It is suitable for larger spikes.
I tried my machine on 4 inch spikes that were in Douglas fir. One shot moved the nails an average of 3/4 of an inch. This was enough that I was able too easily use my Long Bar, to remove them. Probably 90% of the nails I remove , are from flooring or plywood. Therefore, I don't expect to buy the big machine anytime soon.
Goggles are necessary. Sometimes small nails or staples bounce back, off of wall surfaces etc.