This, and others like it, are offshoots of "screw knockers" or "old man" originally used in aviation. Originally, they were only used on screws and similar fasteners. An impact rated bit holder was used at the end along with impact rated bits to pound DIRECTLY on the fastener, creating minute up and down vibrations while turning, thereby loosening whatever (rust/corrosion) is causing the fastener to seize. When using it with SOCKETS, if you want it to operate properly, you need sockets with internal shoulders so the vibration hits DIRECTLY around the edge of the nut or socket, otherwise it's just sliding up and down the side of the fastener. The vibration may help a little, but it's not intended to be used that way. There's a company (I forget who since it's been too long) that makes sockets with internal shoulders for such use. An alternative, thought it will reduce the impacts somewhat, is to fill the excess void with the same size nuts (in this case) with the threads drilled out so they bypass the bolt threads.

I have a similar brand to this. It's amazing... On rusted fasteners. But, you must use special sockets with a short hex length and shoulder that must hit directly on the nut face or top of bolt head. Idea is to shake the rust free, on the threads, apply wd40 or wotever, apply medium torque to get fastener moving anti clock, then move clockwise, and keep going left, right. Don't apply too much torque, or you'll break stuff! I have 100% success rate on daf truck brake disc retaining bolts, only m8, with etorx heads. Amazing process. Saved manys a hub from being scrapped!

Ppl take their time to make these videos, and it helps so many.

Thank you for your time. I appreciate you sharing this.

Primary used on rusted fasteners what you are doing in the vid is not what they are intended for you can't get special sockets that make it work like an impact screw driver but these are mainly used for exhaust manifold bolts suspension/drivetrain ECT

I agree with you totally. These are just a faff. Thanks for posting vid.

Where this is going to occasionally be helpful is rusty bolts/studs getting Kroil or other penetrating oils in to do their job. Not on new stuff that's just tight. You're right though, normal vibrations from an impact are probably just as good.

My guess would be it is for bolts in bushings? Sometimes they get stuck in there and the whole bushing wants to turn with them, perhaps the vibrations help free it up

I wonder if the real purpose is for rusted threaded bolts or screws after hitting it with some penetrating oil, I can see that being useful using 1/2" drive socket drive that have screwdriver bits, as to avoid breaking or snapping rusted screws or bolts from breaking.

I disagree ‘ yes the impact wrench is typically what to use. You could have put a chisel from the air hammer right on a rusted or otherwise stuck bolt and hammered to to break the bond,and then used an air, electric or hand tool to remove. That attachment is useful in that a socket won’t slip off like a chisel. Often times I’d like to hammer a stuck fastener rather than risk shearing it off with an impact wrench.

Going to be a lot of places where the length of the air hammer, + the tool + the socket will be too long. Use will be very limited.

It might work on a nut that have a flange made on it, cause you are only hitting the washer not the nut itself, I'm actually looking up videos to see if it's worth buying.

I guess the idea is that youre getting the benefit of the air hammer combined with your wrenching power. Sounds good in principle and might be worth a try when you cant use a breaker bar which is generally my go to tool for seized nuts.

They made a tool so you don't have to hammer on the head to loosen all so it depends on compressor out put I have that set and they work great I use them on 18 wheelers

That's because 3/4 and 19 are exactly the same. You did that in your Vice in the worst possible position to turn your wrench you had NO LEVERAGE whatsoever

If i dont have shirt enough societs for the end of the tool to best on the bolt head id imagine i could just cut the socket short no?

Too much packaging information. And what they came in is called a sleeve but good review

Rusted bolts. Probably would be a better test subject.

If you had been pushing down on your wrench in a position to be able to put some ass behind your wrench

Might need more powerful impact