Upgrade path

Trap Window Store Two Sided Full→ 4× Wood →Plain Wood Window Plug→ 4× Wood →Window Plug 03→ 10× Cobblestone Rocks →Cobblestone Block→ 10× Concrete Mix →Concrete Block→ 10× Forged Steel →Steel Block

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.

Drops when destroyed

Where to find (18 POIs)

Crack-a-Book HQ (tier 5), Navezgane County Jail (tier 5), Navezgane General Hospital (tier 5), Ostrich Hotel (tier 5), Shamway Factory (tier 5), Shotgun Messiah Factory (tier 5), Two Bit Tower (tier 5), Vanity Tower (tier 5), Olgiddy & Brother Advertising (tier 4), Pineballs Bowling (tier 4), KZL Radio Station (tier 3), Savage Country (tier 3), Triad Medical (tier 3), Bean Counter Court, Circuit Splits Station, Friendszone Sports Center, Navezgane Public Library, Rogue Nerds Refuge.

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