When you buy the hinges, you need to get good quality
NRP,(Non Removable Pin)hinges. The pins on these are held in place by a small hardened Allen head set screw tht is only accessable when the door is open. It locks the pin in place and makes it almost impossible for someone to drive it out.
This is something you won't find at the Home Depot. You need to go to a company that builds doors for commercial use. A set of three will cost you somewhere aroung $35.00 to $40.00,
Also if you go the steel door route, make sure yopu pour concreat into your steel frame.
Good luck.
John
