A look at impact hammers (12v, 18v, and air’s)

So I compared my 12vmax, 18v and, my air impact’s hammers and here it is.  

[External image (oi55.tinypic.com), not copied]

Here is how much their hammers weigh…

[External image (oi51.tinypic.com), not copied]

[External image (oi52.tinypic.com), not copied]

[External image (oi54.tinypic.com), not copied]

My air impact wrench is a cheap 250 foot lb max rated one so that would mean that my 18v impact driver is at least 125 foot lb (enough to loosen up my car lugs)…. though I don’t quite understand the engineering… the spring there. Could be less could be more. Though the weight alone means something.

Anyways… there you go.