The way people treat zombies, it seems almost foolish not to get a zombie killing machine. If you just so happen to be on the lookout for a zombie survival weapon, then the Crovel II would be exactly what you're looking for.
At this point, pop culture has told us that the zombie apocalypse is for sure going to happen; it's unavoidable. With that being said, there are many ways you can go about this, but most of those ways will end up with you as zombie food. If you're looking to avoid that fate, then being prepared is the first step.
The Crovel II is a jack-of-all-trades weapon and features a shovel, hammer, crow bar, saw "super spike" and even a bottle opener, because when the zombie apocalypse does hit, you will need a drink.