In a casino a `` house '' dealer handles the cards for each hand , but a button ( any small item used as a marker , also called a buck ) is rotated among the players to determine the order of dealing and betting in certain games . In a home game , the right to deal the cards typically rotates among the players clockwise , but a button may still be used . In a casino , a house dealer handles the cards for each hand , but the button ( typically a white plastic disk ) is rotated clockwise among the players to indicate a nominal dealer to determine the order of betting .