Basically, if you send a coin to a grading company, they will grade it and put it in a holder, which is called a slab. Here is an example.
http://www.pocketchangelottery.com/SAMPLEpcgs.jpg
The slab is very hard to get open, as the slab is intended to be permanent storage.
http://www.pocketchangelottery.com/SAMPLEpcgs.jpg
The slab is very hard to get open, as the slab is intended to be permanent storage.



















