Look at it he

http://cgi.ebay.com/_W0QQitemZ120207314961

If it weren't for the two spikes in the middle,
I'd say it was a cheese slicer. It looks something
like a curd knife (used to cut the curd into cubes
during cheesemaking), but it's way too small for
that.

Could it be an unusual form of cake rake?

If not, what are those spikes for?