I have called this thing a pestle all the time I have had it. I bought it years ago as a club. I was looking at these links and thought I might just rub the end grain with a little olive oil. Izzy wizzy lets get bizzy we have a club???? Mine is 470mm total length so just a little big than here-
http://southernsudan.prm.ox.ac.uk/details/1979.20.131/
Just 100mm short of this one with a spike.
http://southernsudan.prm.ox.ac.uk/details/1903.16.115/