Do you mean a break stick? I think that's what it's properly called.
http://www.pbrc.net/shop/bsticks.html

For anyone that doesn't know what a breakstick is - it is only to be used on bulldogs, not any other breed when they get in a fight with another dog and it doesn't mean you fight your dogs it seperates them faster without you getting hurt and every responsible APBT 'bulldog' owner should have one.

Breaksticks -

http://www.pbrc.net/breaksticks.html