Ok… well, I guess there is that.
Cold Steel President Lynn Thompson asked his team to create an indestructible bat. The result was the Brooklyn Crusher, a synthetic polypropylene bat that will never break, rot, crack, splinter, or fade. Smasher can be used as a competition bat, for batting practice, and even at-home self defense.
In all seriousness, if you are going to use a baseball bat for personal defense then get a t-ball bat. The shorter length and lighter weight makes them very handy. But in the immortal words of Joe Biden “Buy a shotgun… Buy a shotgun.”