These metal coin banks have a lock and key:
Coin Safe, 2 and 3 Drawer Filing Cabinets, Cash Box.
Disney Princesses Bank, Dora the Explorer Bank,
Go Diego Go Bank, Mail Box Bank, Spiderman Bank, Sponge Bob Bank
This metal bank has a combination lock: Coin Safe
Other metal banks: Coca Cola Bank, Coca Cola Vending Machine Bank,
John Deere Oil Can Bank
These iron banks have removable plugs:
Baseball Mechanical, Black & White Piggy Bank, Cat & Mouse Mechanical Bank,
Dentist Mechanical Bank, Trick Dog Mechanical Bank,
Fishing Mechanical Bank, Flying Piggy Bank, Football Mechanical Bank,
Golf Mechanical Bank, Show Jumper Mechanical Bank,
Trick Pony Mechanical Bank, Jumbo Iron Piggy Bank,
Monkey Mechanical Bank, Noah's Ark Mechanical Bank,
Rabbit Mechanical Bank, Spotted Piggy Iron Bank