White Iron Hatch
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 Hatch: pick this one of its variants when you place it.
Forged Iron× 10
Harvest drops
Iron× 20-30
Taken apart with a harvesting tool (axe, pickaxe, shovel), before perks and tool bonuses.
When it collapses
Falling, it leaves 
Scrap Metal Pile (75% of the time) where it lands.
Where to find (35 POIs)
Champions Coliseum (tier 5), Beanthere Coffee Company (tier 4), ChemTech Distribution Center (tier 4), Coleman's Drive-In (tier 4), Doominium Tower (tier 4), Green Hill (tier 4), Housing Development (tier 4), NDC Checkpoint One (tier 4), Pipeline Gas Co (tier 4), Abandoned Office Building (tier 3), Bob's Boars & Carl's Corn (tier 3), Fiery Farms (tier 3), Fortified Farm (tier 3), Haulwell Freight (tier 3), Shamway Warehouse (tier 3), The Road Gentleman Truck Stop (tier 3), The Serrano Residence (tier 3), Collision Center (tier 2), Downtown Evacuation Point (tier 2), Nick's Motel (tier 2), The Draycott Residence (tier 2), The Johansen Residence (tier 2), Buy-N-Go Rest Stop (tier 1), Camp Carwhal (tier 1), Mercy Point Camp (tier 1), Mushroom Mining Company (tier 1), Bean Counter Court, Drive-Up Coffee, HNN Bank Building, Midway Hospital, Navezgane Public Library, Quick Cup, Stock Shark Offices, The Bath Residence, Zillion Tower.
Points of interest built with this block (any of its variants), the highest tiers first, from the game's prefab files.