The DoN. Nichols entity posted thusly:

According to R.H. :
A new set has been posted:

http://puzzlephotos.blogspot.com/

655) I think that it is called an "adze", and it is for cutting a
flat surface on the side of a log -- useful when making a log
cabin.

No idea what it is, but it isn't an adze. The blade of an adze is at
right angles to the axis of the shaft.