Some casinos sell some retired dice with holes drilled through them as souvenirs. They retain a good-enough balance for casual play. Here is a link I found by

Some casinos sell some retired dice with holes drilled through them as souvenirs. They retain a good-enough balance for casual play. Here is a link I found by searching 'dice holes drilled'. It goes into more detail about the 'why' of retirement than I know about.(https://www.goodgamblingsites.com/articles/why-do-casinos-drill-holes-in-their-dice-and-cards/ https://www.goodgamblingsites.com/articles/why-do-casinos-dr...)