Jeff Layman wrote

One of the wedges on my old lump hammer has come out. Before it came out
completely I had a look and it seemed to be made of wood (this is an old
Chinese(?) 1kg hammer that I've had for over 20 years, with two wedges at
right-angles to each other). I could replace it, but sets of metal
wedges - nearly all of which I'll never need - seem to cost nearly as much
as a new hammer. Any ideas for a functional substitute?

I just bought another with the tomahawk
when one showed up in the aldi special buys.

Guess I could have just got some metal wedged
from some wreck from the garage sales.