I have handled about one thousand .750" dice in the last week. Not the best use of my time, for sure. Although I have a purpose and in the process have sorted out some dice that specific Casino's ask for Security Options. It is not my place to explain every detail, but at least three Security details are available in your personal dice collection. If you do not have a collection or Casino grade dice... it would be a good idea to at least work with them. What would make you secure in the use of the dice used at any Casino Craps Table? For the Dice Bias individuals... I can visualize that the volume of pip coloring be equal on all sides of a die. Six - Ace: The six pips and the one pip enlarged to the volume of the six pips. Five-Two: The same... Four-Three: The same... Or... by the dice manufacture's making the 'illusion of non-bias' does it give the appearance that ALL dice were biased and the Casino's are admitting guilt in the process? No matter how this works out... the active minds will find something. What is your... something?