A dealer button is a must have for your Hold'em Poker game. The dealer button designates who is in the dealer position during your game. The person does not necessarily have to be dealing to be in the dealer position (someone can be dealing for the whole table). The dealer can refer to the button to figure out where the action is in the current game. Normally, dealer buttons are larger than poker chips and have the word "Dealer" engraved into them. They come in plastic, wood, clay, etc. Dealer buttons can just be another color chip or they can be a nice poker artifact that your home game loves showing off.

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Emil Erhart & Walt Impellicceiri
2006