This case is the improved model with nice rounded corners and locks & keys. It is a sturdy aluminium case made of Space Age Material. Called a 500 case, but it can easily hold up to 650 chips depending on the thickness of your chips. Consider this if you might want to add to your chip collection/set in the future. Also holds 2 decks of playing cards! Very nice looking case for storage or carrying your chip set or collection of chips.