Electrical
Blade Trap
Used to chop up zombies into many pieces. Just add zombies and stir.
Repair with Forged Steel.
Crafting
Craft at Workbench · makes 1
Forged Iron× 10
Forged Steel× 10
Mechanical Parts× 8
Electrical Parts× 6
Oil× 10
Harvest drops
Iron× 20-100
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.