Loot containers
Freezer Groceries Middle Empty Closed
If food would ever spoil then it would be a good idea to keep it in here.
Salvage drops
Electrical Parts× 1-5
Short Iron Pipe× 1-2
Extra parts when salvaged with a wrench, ratchet or impact driver.
Drops when destroyed
Iron× 1-15
When it collapses
Falling, it leaves 
Scrap Metal Pile (75% of the time) where it lands.
Where to find (5 POIs)
ParKing Garage #2 (tier 4), Super Shamway (tier 4), Three Dollar Store (tier 3), Uncle Ray's Supermarket (tier 3), Shamway (tier 2).
Points of interest built with this block (any of its variants), the highest tiers first, from the game's prefab files.