The first two pairs are steel, not sure about the offset bit, its kinda hard to tell how they really are from the pics. I do know the offset spurs I have used I have liked.
The last two pairs are cast aluminum.
That is a pretty decent price point for them.
The pads you can take or leave.
The spikes look too pointed, that baby would go right thorough your foot, god forbid, but when I look at them that's what I see.
From a more practical standpoint I would think those spikes sharpened as they are would go a bit deep into the tree, but that is hard to say without really trying them.
Cool to see products from Poland all the same.