Doors and hatches
Blue Jail Door
Press & hold Activate to lock it or set a combination. Upgrade & repair with a construction tool using the secondary action.
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 (2 POIs)
4 Ever Video (tier 3), Hybrid Energy Substation #2 (tier 2).
Points of interest built with this block (any of its variants), the highest tiers first, from the game's prefab files.