Upgrade path

Barbed Wire Fence, Damaged→ 10× Iron →Barbed Wire Fence, Bloody→ 10× Iron →Barbed Wire Fence

Hit a placed block with a stone axe, claw hammer or nail gun while carrying the material of the next step: 4 hits per upgrade.

When its hit points run out it becomes Barbed Wire Fence, Damaged.

Harvest drops

Taken apart with a harvesting tool (axe, pickaxe, shovel), before perks and tool bonuses.

Where to find (1 POIs)

The Secret Chamber.

Points of interest built with this block (any of its variants), the highest tiers first, from the game's prefab files.