What this means is that you should use Rogues to steal, and if you always want to have a 99% chance to steal, make sure your Rogue's level is at least (enemy level / 2 + 141), and use vanilla, level 0 Bandit's Hands. A level 1 Rogue should be able to steal anything with a Hand with at least 7062 hit, but you'd be wasting a lot of Marksmen.