One handed hammer of reasonable size I came across this with the condition of a shot wood handle with the fewest strokes (most important). By thinking of shockless, I think that this is the limit for the size of the head, but if I actually use it, I will forget such a thing. Although there is also exquisite softness of wood handle, there is no shock to the hand with the shockless effect (twice strike) effect, but it still ends with work with few blows. (Although it is driven by the impulse wanting to hit more ... ·) Structurally, I think that there is no gauge, but it is the strongest as a one hand hammer. The work which had been hammering out one size above can be done with this. Once you hit a steel floor etc. with a full swing, I think that you can see the amazingness of shockless.