A cooler in blackjack is a card counter tool used to improve your chances of winning. It is a small plastic or metal box, about the size of a deck of cards, that has a number of holes in it.
The holes are spaced evenly around the edge of the box and are spaced so that they line up with the suit symbols on the face of a regular playing card.
When you are playing blackjack, you can use a cooler to keep track of your hand. You place one end of the cooler on the table and lay the other end on top of your hand so that the suits are face down.
Then you just flip over any cards that are in your hand so that you can see the suit symbols and how many cards are in each rank. This way, you can keep track of how many cards each rank has and make better decisions about when to hit or stand.
Coolers can also be used to count up your points at the end of a hand. Just like in poker, you want to aim for as high a point total as possible at the end of each hand.
By counting up all of your points from one hole to the next, you can ensure that you always have an accurate tally.
