Protection from die rolls means the equipped creature can’t be dealt damage by, equipped or enchanted by, blocked by, or targeted by anything that allows or requires someone to roll a die. This includes any kind of dice, not just six-sided dice. This also includes anything that allows you to reroll a die.

The equipped creature won’t have protection from anything that cares about the results of dice without allowing or requiring someone to roll a die, such as Snickering Squirrel.