Upgrade path

Trap Window Store One 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 (17 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), Vanity Tower (tier 5), Hybrid Energy (tier 4), Olgiddy & Brother Advertising (tier 4), Pineballs Bowling (tier 4), Shotgun Messiah Range (tier 4), KZL Radio Station (tier 3), Savage Country (tier 3), Triad Medical (tier 3), Maggie's Corner Cafe (tier 2), Rise Realty (tier 2), Friendszone Sports Center.

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