Black Iron Door
Press & hold Activate to lock it or set a combination. Upgrade & repair with a construction tool using the secondary action.
Upgrade path
Hit a placed block with a stone axe, claw hammer or nail gun while carrying the material of the next step: 6 hits per upgrade.
Crafting
Craft at Backpack · makes 1
Crafted as Iron Door: pick this one of its variants when you place it.
Forged Iron× 10
Harvest drops
Iron× 4-10
Taken apart with a harvesting tool (axe, pickaxe, shovel), before perks and tool bonuses.
Drops when destroyed
- Iron× 10
When it collapses
Falling, it leaves 
Scrap Metal Pile (75% of the time) where it lands.
Where to find (37 POIs)
Champions Coliseum (tier 5), Correa Rockworx (tier 5), Dr. Karen Higashi Residence (tier 5), Haven Hotel (tier 5), Navezgane Corrections (tier 5), Two Bit Tower (tier 5), Vanity Tower (tier 5), Beanthere Coffee Company (tier 4), Butcher Pete's (tier 4), Don Vittorio Spagetto Residence (tier 4), Green Hill (tier 4), Richard Munchz Plaza (tier 4), The Mortician's house (tier 4), Buy-N-Go Apartments (tier 3), Greg's Motel (tier 3), Jack's Lumber Mill (tier 3), KLZ Radio (tier 3), Pawsnout Factory (tier 3), Shady Woods Amphitheatre (tier 3), The Neckarski Residence (tier 3), White Hill Church of God (tier 3), Glove Affair Boxing Gym (tier 2), McPherson UFO Museum (tier 2), The Cartel House (tier 2), Bomb Shelter 41 (tier 1), The Cylinder (tier 1), Blue Clover Hotel, Crispwell Residence, Demolition Site, Hybrid Energy Substation #4, Hybrid Energy Substation #5, Patriot Pavilion, Perk Penny Place, Power Distribution Station #1, Ship-n-sip Station, The Doll House, USA #1 Type Bunker.
Points of interest built with this block (any of its variants), the highest tiers first, from the game's prefab files.