The Z.D.F. Fence is a foreground block that can be bought from the Sales-Man for 20 Zombie Brains. It has the exact same texture as the Chainlink Fence, but there is a sign with the letters "Z.D.F."
In-Game Description:
Let the zombies know what they're in for if they trample your fence! The Z.D.F is ready to rumble!
This item can't be spliced. This item doesn't drop any seeds.
Z.D.F Fence