Bluff catchers are weak hands that can really only beat a bluff. They’re not strong enough to bet with although there can be some value from allowing opponents to bluff their missed draws or just total air. Generally, when a player makes a “hero call” it’s made with a bluff catcher hand when they have some type of showdown value like Ace high, King high, and small pairs.
Watch Patrick Antonius make a hero call with Queen high on the Million Dollar Cash Game.