Shredder

Shredders damage zombies; they can be applied to your base.
==Notes==
Good for placing at doorways.
Good as landmine-ish things.
It costs 95$, which makes it the most pricey buildable item.
I've heard someone say it won't place down- better check that out.
It, at one point, could damage you.
Oni's Tip: Best used stacked with Nets. Zombies will trip and fall onto the shredders and die quickly.
Shredder